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Upgrading the cat-back exhaust on a 2014-2018 GMC Sierra 1500 can change how the truck breathes, sounds, and performs during everyday driving and towing. The right system improves exhaust flow, resists corrosion, and produces the tone you want without causing fitment headaches.This guide covers six shortlisted cat-back exhaust systems that fit the 2014-2018 Sierra 1500. We focused on real-world criteria that matter to owners of this generation, including material longevity, fitment accuracy, and expected sound character. Read on to see which options match your goals and what to expect during installation.
Looking for other parts? See all GMC Sierra 1500 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | MagnaFlow Street Series Cat-Back Performance Exhaust System (Black Coated) |  |
| Best Quality Built to a higher standard if you want something more solid | Borla 140550 Cat-Back Exhaust System for 2014–2018 Silverado/Sierra 5.3L V8 |  |
| Best Value The sweet spot between price and what you get | Flowmaster FlowFX Cat-Back Exhaust System (717857) |  |
| Best Budget The cheapest option that still gets the job done reliably | Northeastern Exhaust Stainless Steel Muffler Tail Pipe Kit for GMC Sierra 1500 (2014–2017) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Borla 140537 Cat-Back Performance Exhaust System, T-304 Stainless, Dual Rear Exit |  |
| Most Popular A crowd favorite that many people choose with confidence | Flowmaster FlowFX Cat-Back Exhaust Kit with 4" Black Ceramic Tips |  |
1. MagnaFlow Street Series Cat-Back Performance Exhaust System (Black Coated)
| Vehicle fitment | 2014–2018 GMC Sierra 1500 |
|---|---|
| System type | Cat-back |
| Construction | Black coated stainless steel |
| Model | Street Series |
This MagnaFlow Street Series cat-back replaces the factory exhaust downstream of the catalytic converter to improve flow and give the Sierra a fuller, moderate street tone without excessive cabin noise. It uses mandrel-bent piping and straight-through mufflers to reduce restriction, which is why MagnaFlow cites dyno-proven power gains. The system is stainless steel with a black coated finish and CNC precision manufacturing for consistent fitment and corrosion resistance. Installation is bolt-on and designed from 3D scans to match factory hangers and routing for the 2014–2018 Sierra 1500, so most DIYers with basic tools should be able to install it in a garage. Expect a noticeable but not aggressive exterior sound and improved throttle response; buyers seeking racecar loudness will find it too tame. The finish has a one-year coating warranty and the construction carries a limited lifetime warranty, which helps protect the investment over time.
Best for: Buyers who want a well-balanced exhaust upgrade that adds measurable flow and a pleasant street tone while keeping interior noise comfortable and retaining factory-like fitment.
Less Ideal for: Drivers who prioritize maximum loudness or race-style sound and those seeking a no-finish-change polished look should consider different systems.
- Designed specifically for 2014–2018 Sierra 1500 fitment with bolt-on installation
- Mandrel-bent stainless piping and straight-through mufflers for improved flow and measured power gains
- Moderate exterior sound with subdued cabin noise for daily driving
- Black coated stainless tips and corrosion-resistant construction with precision manufacturing
- Limited lifetime construction warranty provides long-term protection
- Black coating has a separate one-year finish warranty which may wear differently than the underlying stainless steel
Verdict: Choose this MagnaFlow Street Series cat-back if you want a durable, bolt-on exhaust that improves flow and adds a controlled, street-friendly tone to a 2014–2018 Sierra 1500.
2. Borla 140550 Cat-Back Exhaust System for 2014–2018 Silverado/Sierra 5.3L V8
| Compatible Vehicle | Truck (2014–2018 Silverado/Sierra 5.3L V8) |
|---|---|
| Material | T-304 Stainless Steel |
| Installation Type | Bolt-On |
| Included Components | Catback |
This Borla cat-back replaces the factory rear section with mandrel-bent piping and straight-through muffler technology to increase flow and produce a fuller, more aggressive V8 tone while remaining bolt-on for typical garage or shop installation. Made from T-304 austenitic stainless steel and CNC-manufactured components, it aims to reduce backpressure and hold up well in salted-road climates. Buyers report straightforward installation once the old system is removed, with occasional hanger adjustment needed for perfect fitment. In use the system offers a richer exhaust note without becoming annoyingly loud at cruise, and the design supports improved exhaust scavenging that can help throttle response on naturally aspirated engines. The unit carries Borla build quality and a long service life, but expect a performance gain primarily in sound and throttle feel rather than large horsepower jumps on stock engines; additional tuning or intake upgrades will reveal more of the power potential.
Best for: Enthusiasts who prioritize a durable, factory-quality exhaust that sharpens throttle response and delivers an aggressive but usable V8 sound on their 2014–2018 Silverado/Sierra.
Less Ideal for: Drivers seeking large, guaranteed horsepower gains without other engine modifications or those who need a very quiet, near-stock exhaust tone.
- T-304 stainless construction resists corrosion for long service life
- Mandrel-bent piping and straight-through design support improved flow and throttle response
- Bolt-on installation uses factory-style fittings for relatively simple fitment
- CNC manufacturing provides consistent, accurate fit and reduced need for modification
- Gains are mostly in sound and response; significant horsepower increases require additional engine modifications
Verdict: Choose this Borla cat-back if you want a durable, bolt-on exhaust that sharpens throttle response and delivers an aggressive, high-quality V8 sound for your 2014–2018 Sierra.
3. Flowmaster FlowFX Cat-Back Exhaust System (717857)
| Compatible vehicles | 2014–2018 Silverado/Sierra 1500 5.3L |
|---|---|
| Muffler type | Flow FX straight-through |
| Installation type | Bolt-On |
| Tip diameter | 4.5-inch ceramic coated tips |
The Flowmaster FlowFX cat-back replaces the factory rear exhaust on 2014–2018 Silverado/Sierra 1500 5.3L trucks and aims to add a deeper, fuller tone without overwhelming cabin noise. It uses a straight-through Flow FX muffler and large 4.5-inch ceramic-coated tips for a rich rumble that is noticeably louder than stock but still tame at highway speeds. Fitment is vehicle-specific and bolts on using factory hanger locations, so installation is straightforward for a home mechanic and typically only requires basic tools and a replacement clamp in many cases. The kit is full stainless steel for corrosion resistance and carries a lifetime limited warranty, but some users report surface rust on pipes and tip coating wear over long-term use. Practical owners will appreciate the balance of improved exhaust flow, a modest horsepower feel, and an aggressive look, while those seeking an extreme, raspy loud system should look elsewhere.
Best for: Buyers who want a practical, factory-like upgrade that improves sound and flow without making the truck overly loud, and who value easy bolt-on installation and durable construction for daily driving.
Less Ideal for: Not a good choice for buyers who want an extremely loud or aggressive exhaust character or who need a high-end show-quality finish that resists all surface wear.
- Vehicle-specific fit for 2014–2018 Silverado/Sierra 1500 makes installation straightforward
- Flow FX straight-through muffler delivers a deep, controlled rumble without excessive cabin drone
- Full stainless steel construction for better corrosion resistance than mild steel
- Uses factory hanger locations so no custom brackets or major fabrication required
- Some users report surface rust on pipes and deterioration of the tip coating after months of use
Verdict: A practical, vehicle-specific cat-back that gives 2014–2018 Sierra owners a deeper, refined sound and easy bolt-on installation without exaggerated volume.
4. Northeastern Exhaust Stainless Steel Muffler Tail Pipe Kit for GMC Sierra 1500 (2014–2017)
| Compatible vehicles | GMC Sierra 1500 2014–2017 4.3L |
|---|---|
| Material | 409 Grade Stainless Steel |
| Installation type | Clamp-On |
| Included components | Clamps, Hangers |
| Fit type | Vehicle Specific Fit |
This Northeastern Exhaust muffler and tail pipe kit is a vehicle-specific, clamp-on cat-back style replacement for the 2014–2017 GMC Sierra 1500 4.3L that ships with clamps and hangers for installation. Constructed from 409-grade stainless steel with a polished finish, the kit aims to resist corrosion and improve exhaust flow to reduce back pressure, which can help with throttle response and low-end torque in everyday driving. Installation is intended to be straightforward for a DIY enthusiast or a shop since it uses clamp-on connections rather than welding. The kit includes the common hardware needed for mounting but does not advertise advanced features like mandrel-bent piping or performance-tuned mufflers, so expect a modest sound and performance gain rather than a race-style note. The vehicle-specific fit and included hangers make it a sensible budget-friendly route to replace a worn exhaust or freshen up performance without major modification, while buyers wanting aggressive sound or maximum flow may prefer higher-end performance systems.
Best for: Buyers on a budget who need a reliable, vehicle-specific replacement exhaust that is easy to install and restores proper fitment and function without aftermarket tuning.
Less Ideal for: Drivers seeking an aggressive sound profile or maximum flow for high-performance builds should consider a dedicated performance cat-back designed and tuned for those goals.
- Vehicle-specific, direct-fit design simplifies installation for the listed Sierra models
- 409-grade stainless steel construction improves corrosion resistance vs plain steel
- Includes clamps and hangers so no extra mounting hardware is required
- Clamp-on installation avoids welding and speeds up replacement
- 409-grade stainless is less corrosion-resistant than higher grades like 304
Verdict: A practical, budget-friendly direct-fit exhaust kit that restores fitment and improves corrosion resistance for 2014–2017 GMC Sierra 1500 owners seeking a straightforward replacement.
5. Borla 140537 Cat-Back Performance Exhaust System, T-304 Stainless, Dual Rear Exit
| Material | T-304 Stainless Steel |
|---|---|
| Tips | Dual 4-inch rounded chrome tips |
| Fitment | 2014–2018 GMC Sierra 1500; 2019 Silverado/Sierra 1500 LD only |
| Installation | Bolt-on with supplied hardware |
| Construction | All welded |
This Borla cat-back replaces the factory rear section with a full T-304 stainless steel system designed to increase flow, sharpen throttle response, and deliver a deep, controlled exhaust note without interior drone. It installs as a bolt-on using supplied hardware and CNC-formed pipes; many owners report a straightforward two-person install with common hand tools. Borla’s patented straight-through and multi-core technologies aim to preserve midrange torque while reducing backpressure, so the truck feels more responsive under throttle and sounds lively at wide open throttle yet stays mellow during cruising. Notable features include all-welded construction, a no-drone tuning approach, and 4-inch dual polished tips for a finished look. Expect louder cold starts that settle as the system warms up and the need for proper fitment verification before installation to avoid bracket mismatch. This is a durable, factory-quality upgrade that prioritizes long-term corrosion resistance and consistent performance for daily-driven trucks and long-haul use.
Best for: Buyers who want a durable, factory-quality exhaust that improves sound and throttle response while avoiding intrusive cabin drone, and who value long-term reliability over lowest cost.
Less Ideal for: Shoppers seeking a completely stock quiet factory sound or those unwilling to verify part fitment and handle a moderately involved DIY or shop install should consider other options.
- T-304 stainless construction for strong corrosion resistance and longevity
- Patented straight-through/multi-core design improves flow and maintains a refined, no-drone cabin tone
- Bolt-on fit with CNC-formed components and supplied hardware for generally straightforward installation
- Distinctive deep exhaust note and stronger throttle response at higher RPMs
- Cold starts are noticeably louder until the system warms up
Verdict: Choose this Borla cat-back when you want a long-lasting, factory-quality stainless system that delivers a refined deep tone and improved responsiveness without cabin drone.
6. Flowmaster FlowFX Cat-Back Exhaust Kit with 4" Black Ceramic Tips
| Fitment years | 2014-2018 |
|---|---|
| Vehicle fit | Classic-body Chevy/GMC 1500 Crew/Double Cab |
| Material | 409S stainless steel |
| Tip diameter | 4.00 inches |
| Exhaust type | Cat-back FlowFX |
The Flowmaster FlowFX cat-back replaces the factory rear exhaust from the catalytic converter back with mandrel-bent stainless tubing, a straight-through muffler core, and large 4-inch black ceramic tips to give the truck a deeper, more aggressive tone. It is dyno-tuned for performance and includes clamps, hangers, and hardware to complete the installation. Typical use is street and light performance driving where you want more rumble on throttle without a constant loud drone at cruise. Installers report the system fits factory mounting locations well but may require drilling or frame hanger modification and replacement of the supplied self-tapping screws with heavier fasteners for long-term durability. Practical benefits include a stronger exhaust note, potential small MPG improvement, and corrosion-resistant 409S stainless construction. Important limitations are that installation can be moderately involved for a home mechanic and some supplied hardware can be understrength, so plan to have basic tools and a few upgraded fasteners ready.
Best for: Buyers who want a deeper, performance-oriented exhaust tone and modest gains in flow while keeping a mostly factory-style installation and appearance; ideal for those who value community feedback and want a proven, popular system.
Less Ideal for: Drivers seeking a completely silent or strictly stock sound, or anyone unwilling to modify or replace flimsy mounting hardware during installation should consider other options.
- Mandrel-bent stainless tubing for improved flow and corrosion resistance
- Dyno-tuned straight-through muffler delivers a deeper, aggressive tone without excessive rasp
- Includes clamps, hangers, and hardware for a mostly complete installation
- Large 4-inch ceramic-coated tips give a finished look and resist discoloration
- Some supplied self-tapping hanger screws and clamps are reported as undersized or prone to failure, requiring replacement
Verdict: Choose this Flowmaster kit if you want a well-tuned, deeper exhaust tone and a durable stainless cat-back that many owners have successfully fitted to 2014–2018 Sierra 1500 trucks.
Choosing the Right 2014-2018 GMC Sierra 1500 Cat-back Exhaust System: Key Factors to Consider
Material and Corrosion Resistance
Material choice directly affects how long a cat-back exhaust will last on a 2014-2018 Sierra 1500. Stainless steel alloys resist rust in wet or salted-road environments and typically outlast aluminized steel, which can flake and corrode faster. Thicker pipe walls and mandrel-bent tubing also hold up better against road debris and thermal cycling.
For owners who plan to keep their Sierra for several years or live in corrosive climates, prioritize higher-grade stainless and welded construction. Consider whether the system offers a corrosion warranty or replaceable tips, which can reduce long-term ownership costs.
Sound Character and Muffler Design
Sound is often the primary reason Sierra 1500 owners choose a cat-back upgrade. Muffler design, resonator placement, and pipe diameter determine whether the truck gains a deep, throatier tone or a louder, raspy note. Chambered mufflers tend to produce a tuned, mellow deep sound while straight-through designs emphasize volume and rasp.
Think about where and how you drive the truck. If you tow or use the Sierra as a daily driver, a balanced tone with limited drone at highway RPMs will be more livable. If you want a more aggressive sound under acceleration and do not mind some cabin noise, a straight-through layout may be acceptable.
Pipe Diameter and Flow Characteristics
Pipe diameter affects backpressure and engine breathing. For the 2014-2018 Sierra 1500, matching diameter to the engine and usage avoids losing low-end torque or creating excessive drone. Slightly larger diameters can improve high-RPM power and throttle response but may reduce scavenging at lower revs.
Mandrel bends preserve cross-sectional area through curves, maintaining smoother flow compared with crush-bent piping. When evaluating systems, look for the diameter range and bend style that suits your engine and the way you use the truck—street driving, towing, or performance.
Fitment and Installation Complexity
A system designed specifically for 2014-2018 Sierra 1500 fitment cuts installation time and reduces the need for modifications. Properly located hangers, factory-style mounting points, and correct tip alignment are important to avoid rattles and ensure ground clearance. Systems that require cutting the factory pipes or welding increase labor and complexity.
Consider whether you will install the system yourself or use a shop. Bolt-on systems that reuse factory hangers and clamps can be installed by an experienced DIYer, while systems requiring welding or special tools are better left to professionals. Also verify clearance around suspension components and the spare tire area to prevent interference.
Tip Style and Finishing Options
Tips affect both looks and the last bit of sound tuning. Polished stainless tips present a factory-plus appearance and resist discoloration, while black-coated or rolled-edge tips offer a more subdued aesthetic. Dual tips can change perceived width and visual balance at the rear of the Sierra.
Evaluate whether the tips are welded or bolted on for easier replacement. Some systems include larger-diameter tips that visually imply more performance but do not change flow if they are purely cosmetic. Choose a finish that complements your truck and that will stand up to the local climate.
Warranty and Aftermarket Support
Warranty terms and available replacement parts matter for long-term ownership. A clear manufacturer warranty on materials and workmanship gives confidence against premature failure, especially in corrosive environments. Availability of replacement hangers, resonators, or tips reduces lifetime maintenance headaches.
Also check whether the vendor provides detailed fitment diagrams and hardware kits. Good customer support can speed resolution of fitment questions and simplify installation for owners who prefer DIY projects.
How Cat-Back Layouts Affect Towing and Payload
When your Sierra 1500 is used for towing, the cat-back layout can influence exhaust backpressure under load and the amount of cabin drone during highway pulls. Systems that maintain steady flow without excessive diameter jumps preserve low-end torque important for moving trailers.
Consider systems with resonators placed to reduce harmonic drone at common towing cruise speeds. Also ensure pipe routing maintains ground clearance and avoids contact with suspension components or the tow hitch.
If you frequently carry heavy payloads, confirm the system retains clearance for moving suspension parts and that tip placement does not interfere with trailer hookups.
- Look for consistent pipe diameter to preserve low-end torque during towing
- Resonators help reduce cabin drone on long highway pulls
- Verify tip placement relative to hitch and spare tire
DIY Installation Tips for the Sierra 1500
Many cat-back systems for the 2014-2018 Sierra 1500 are designed for bolt-on installation using factory hangers and clamps. Before starting, raise the truck safely with jack stands and allow the exhaust to cool. Spray penetrating lubricant on hangers and fasteners to ease removal.
Keep a set of common tools on hand: ratchets, penetrating oil, a hacksaw or pipe cutter if minor trimming is required, and replacement gaskets or clamps. Use torque specifications if provided and double-check for even tip alignment once the system is loosely mounted.
- Work on a cool exhaust to avoid burns
- Use penetrating oil and let it soak for stuck bolts
- Test-fit before tightening clamps to ensure alignment
Noise Regulations and Street Use Considerations
Local noise ordinances and inspection rules can affect which cat-back systems are appropriate for street-driven Sierra 1500s. Aim for a system that balances the desired tone with legal limits and the likelihood of inspection.
Some muffler designs reduce peak sound but still deliver a sporty note during acceleration. If you often drive in residential areas or go through inspection stations, choose a milder sound profile or one with removable resonators to adjust tone when needed.
- Check local laws for maximum dB limits
- Consider systems with adjustable or removable resonators
- Test the system at typical driving speeds to evaluate real-world noise
Material Choices: Stainless Grades and Coatings
Not all stainless is the same. Higher-grade stainless resists corrosion and staining better, which is especially relevant for trucks that see snow, road salt, or coastal air. Coatings can add temporary protection but often wear off over time.
Also look at weld quality and whether seams are TIG welded versus tack-welded. Better welds reduce the chance of cracks forming under thermal cycling, which extends service life for trucks that rack up mileage.
- Prioritize higher-grade stainless for longevity in harsh climates
- Check for continuous, clean weld beads
- Understand that coatings may be cosmetic and wear with time
Tuning and Performance Gains to Expect
A cat-back exhaust can contribute to modest improvements in throttle response and high-end power by reducing backpressure. Realistic gains depend on engine, cam profile, and whether other supporting modifications are present. For stock-engined Sierra 1500s, expect the primary benefits to be sound and responsiveness rather than large horsepower jumps.
Pairing the exhaust with proper engine tuning or intake improvements can unlock more measurable gains. If you are pursuing performance, confirm that the exhaust diameter and muffler flow support your planned modifications.
- Expect modest gains in throttle response and high-rpm breathing
- Significant horsepower gains typically require additional tuning or mods
- Match exhaust diameter to your planned performance goals
Appearance and Rear-End Fitment Notes
How the tips sit relative to the bumper affects the finished look. Some systems tuck tips slightly inward for a factory look, while others extend tips for a sportier appearance. Check images and fitment notes for 2014-2018 Sierra 1500 to confirm the visual outcome.
Also confirm whether the system clears the spare tire well and rear suspension components, particularly on models with factory exhaust routing that varies by cab or bed configuration.
- Decide between tucked or extended tip looks
- Confirm clearance around spare tire and suspension
- Consider finish options like polished or black-coated tips
Still looking for the perfect fit?
Select your GMC Sierra 1500 configuration to see the most relevant Cat-back Exhaust Systems recommendations
How We Chose the Best 2014-2018 GMC Sierra 1500 Cat-back Exhaust System
We built our shortlist by filtering options designed specifically for the 2014-2018 GMC Sierra 1500 to ensure correct hangers, bends, and clearances for this truck generation. We prioritized systems that specify vehicle fitment for the 2014 to 2018 model years and that match common cab and bed configurations for the Sierra 1500.Evaluation criteria included corrosion resistance and material grade because the Sierra is often used in varied climates and on salted roads; exhaust flow design and pipe diameter for drivability and throttle response; muffler and resonator design to assess expected sound level and character; fitment accuracy and factory-style hangers to reduce installation time; and serviceability such as replaceable tips or modular sections. We also considered installation complexity and whether the system requires cutting, welding, or specialized hangers.Excluded from consideration were universal-fit systems without Sierra-specific fitment, components that only replace the muffler or tailpipe without a full cat-back layout, and products lacking clear material or fitment specifications. The result is a focused list of full cat-back systems suitable for owners who want improved flow, tailored sound, and reliable fitment for their 2014-2018 Sierra 1500.
Our full evaluation process is outlined in our review methodology.
FAQ
Will a cat-back exhaust improve fuel economy on my 2014-2018 Sierra 1500?
A cat-back exhaust can slightly improve efficiency by reducing backpressure, which may marginally affect highway fuel economy. Any gains are usually small and depend on driving habits and whether the engine is otherwise stock.
How long does installation usually take for a bolt-on cat-back on this Sierra?
Bolt-on installations for a Sierra 1500 typically take two to four hours for someone with basic mechanical skills. Time increases if hangers or bolts are corroded or if trimming, cutting, or welding is required.
Will changing to a larger pipe diameter hurt low-end torque?
If the diameter is significantly larger than stock, you can lose some low-end scavenging and throttle response. Moderate increases chosen to match engine displacement and intended use usually preserve low-end torque while improving high-RPM flow.
Do I need an alignment or other adjustments after installing a cat-back?
Installing a cat-back normally does not require a wheel alignment. However, you should check tip alignment and hanger positioning and inspect for any contact with suspension or body components after the first drive.
Can I install a cat-back myself or should I hire a shop?
Many Sierra 1500 owners can install a bolt-on system at home with common tools. Hire a shop if the system requires cutting, welding, or if you are uncomfortable working under the truck.
Will a louder cat-back cause issues with warranty or inspections?
A louder exhaust can draw attention during inspections or in areas with noise regulations. It generally does not affect vehicle manufacturer warranty for unrelated components, but check local rules and inspection standards before choosing a very loud setup.
Final Verdict
Choosing the right cat-back exhaust for a 2014-2018 GMC Sierra 1500 comes down to balancing sound, durability, and fitment. Prioritize material grade and corrosion resistance if you drive in harsh environments, and match pipe diameter and muffler type to the driving and towing you do most.Decide whether you value a subtle, refined tone or a louder, more aggressive note, and factor in installation complexity when planning the upgrade. With the right priorities, you can select a system that delivers a noticeable improvement in sound and responsiveness while fitting cleanly on your Sierra 1500.
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