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If your Buick Regal is showing signs of poor performance or louder-than-normal exhaust noise, the exhaust manifold may be the culprit. Choosing the right Buick Regal exhaust manifold matters because it affects engine breathing, emissions behavior, and long-term durability under heat and vibration. This guide covers the top shortlisted options for the Buick Regal and explains the evaluation criteria we used, including fitment accuracy and thermal performance. Read on to see the top picks and what to look for when replacing the manifold.
Looking for other parts? See all Buick Regal parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Dorman 674-217 Passenger-Side Exhaust Manifold Kit with Gaskets and Hardware |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 674-732 Passenger Side Exhaust Manifold Kit |  |
| Best Budget The cheapest option that still gets the job done reliably | NewYall L4 2.4L Exhaust Manifold with Gasket Kit |  |
| Most Sold A high-volume bestseller chosen again and again | V/A Turbo Exhaust Manifold for 1.4L Turbo (fits select GM 1.4T vehicles) |  |
| Best Overall The best all-around choice for most situations | A-Premium Exhaust Manifold Kit with Gasket, Nuts and Bolts |  |
1. Dorman 674-217 Passenger-Side Exhaust Manifold Kit with Gaskets and Hardware
| Automotive Fit Type | Universal Fit |
|---|---|
| Bolt Pattern (Number of Holes) | 6 |
| Vehicle Service Type | Car |
| Manufacturer | Dorman Products |
This Dorman passenger-side exhaust manifold kit is a practical replacement part intended to restore a leaking or damaged manifold to factory-quality function on compatible GM Vortec-equipped vehicles. It arrives painted and includes gaskets and the downpipe mounting hardware so you can complete the repair in one visit to the shop, which simplifies installation and reduces downtime. The casting matches factory geometry for a straightforward bolt-on fit for specified models, and the construction is designed to resist warping and cracking that commonly cause exhaust leaks. Some buyers report minor casting finish issues and the occasional missing or tucked-away gasket, so check packaging carefully before starting the job. A few customers needed to chase collector stud threads and adapt metric hardware during installation, which may extend labor time for DIYers without the right tools. For a reliability-focused repair that gets the exhaust sealed and back to normal without sourcing multiple parts, this kit covers what most technicians need in one box.
Best for: Reliability-focused buyers who prioritize a complete, factory-style repair solution that minimizes repeat visits and returns to the parts counter.
Less Ideal for: Buyers seeking a performance upgrade or custom headers should look elsewhere, and those without basic hand tools or metric threading tools may prefer professional installation.
- Includes necessary gaskets and downpipe hardware for a one-order repair
- Designed to match factory fit and mounting locations for straightforward installation
- Painted finish and durable construction intended to resist warping and cracking
- Covers common Vortec GM applications so replacement is widely applicable
- Some units show rough casting finish that may require light cleanup before installation
- Occasional reports of gaskets hidden in packaging or missing from box
- Collector studs may need thread chasing or metric adapters during fitment
Verdict A practical, reliability-minded replacement manifold kit that bundles gaskets and hardware to simplify a trusted repair, though check the packaging and be prepared to address minor fitment fiddles.
2. Dorman 674-732 Passenger Side Exhaust Manifold Kit
| Installation Type | Bolt-On |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Manufacturer | Dorman Products |
| Position | Center |
| Bolt Pattern (Number of Holes) | 7 |
This Dorman manifold kit replaces a cracked or warped passenger-side exhaust manifold with a ductile iron unit designed to resist heat-related distortion. It ships as a complete kit with the manifold, gaskets, flange gaskets, studs and nuts so you can do a one-stop repair without sourcing separate parts. The part is reverse-engineered from factory components for a direct, vehicle-specific fit and is intended for bolt-on installation. In real use the heavier ductile iron construction should hold up better than lower-grade cast iron under high-temperature driving, which benefits performance-oriented owners who push the engine harder. Several owners report minor fitment tweaks such as filing for sensor clearance and replacing the supplied gasket or additional bolts, so expect to verify sensor and bolt requirements on your vehicle before installation. The kit simplifies replacing a leaking or broken manifold but may require buying higher-quality fasteners or a premium gasket for the most reliable long-term seal.
Best for: Performance-oriented buyers who prioritize durable, factory-quality replacement parts to restore exhaust integrity and tolerate light hands-on fit checks during installation.
Less Ideal for: Buyers seeking a plug-and-play, perfect-finish upgrade without any adjustment or those who prefer an aftermarket performance manifold with integrated tuning features.
- Complete kit with manifold, gaskets, studs and nuts for a single-order repair
- Ductile iron construction offers improved resistance to warping and cracking under heat
- Designed as a direct, vehicle-specific bolt-on replacement to simplify installation
- Factory-supplied gasket and some fasteners in the box are reported as lower quality and may need upgrading
- Some users had to trim or grind a small area for sensor or clearance fitment
Verdict A robust, vehicle-specific replacement manifold built for durability and one-order convenience, but plan to upgrade the gasket and some fasteners for the best long-term seal.
3. NewYall L4 2.4L Exhaust Manifold with Gasket Kit
| Engine fitment | L4 2.4L |
|---|---|
| Compatible models | Buick Regal (2011-2017) and other 2.4L Buick models |
| Brand | NewYall |
| Manufacturer part number | 1263074l |
This NewYall exhaust manifold kit is a low-cost replacement designed for the 2.4L L4 engines used in Buick Regal and other Buick models with that engine. It replaces a cracked or leaking factory manifold and includes a gasket kit and mounting hardware so you can swap it in during a repair. Fitment for the 2.4L Buick application is generally good and several buyers report the oxygen sensor threads and overall mating surface align well, which means a straightforward installation in many garages. The casting finish is a bit rough compared with factory parts and some customers needed to reuse original gaskets or drill out bolt holes to get perfect alignment, so expect minor fitment work on some cars. The included gaskets and hardware have mixed feedback, so professionals may prefer to use higher-quality gaskets and torque hardware to factory specs. For owners looking to fix a leak economically, this manifold delivers the main function at a much lower cost than OEM replacements but may require modest additional parts or fitting time.
Best for: Budget-conscious Buick Regal owners seeking an inexpensive repair solution for a cracked or leaking 2.4L manifold and willing to do basic installation or pay a local shop for minor adjustments.
Less Ideal for: Buyers who want a perfect factory-fit, brand-new factory-quality part without any post-purchase adjustments or those who prefer to replace gaskets and hardware with premium components from the start.
- Affordable replacement targeted at 2.4L Buick engines
- Includes gaskets and mounting hardware for a single-purchase repair
- Many buyers report the oxygen sensor thread and primary ports line up correctly
- Thicker casting than some factory parts which can improve durability
- Casting finish is rough and may need minor cleanup before installation
- Included gaskets and hardware are inconsistent in quality
- Some bolt holes may require drilling or alignment adjustments on certain vehicles
Verdict A cost-effective manifold that gets a 2.4L Buick back on the road but expect to replace or upgrade the supplied gaskets and do small fitment tweaks for best results.
4. V/A Turbo Exhaust Manifold for 1.4L Turbo (fits select GM 1.4T vehicles)
| Compatible engine | 1.4L 1.4T Turbocharger |
|---|---|
| Manufacturer part number | 55565353 |
| Brand | V/A |
This cast turbo exhaust manifold replaces the cracked or worn manifold around the wastegate on 1.4L turbo GM engines and is intended for use when the turbocharger itself is still serviceable. It installs in the turbo assembly to route exhaust into the turbine housing and includes an alignment pin to help mating the pieces. In practice the part is a budget-friendly repair option that many home mechanics and shops use to avoid buying a complete turbo. Reviewers report straightforward installation and good fit in most cases, and several note the part cured underboost and wastegate sealing issues. However quality control varies: some buyers found counterbores or flange depths that required modification, and fitment can be looser than factory on occasion. Use careful inspection before assembly and verify turbine wheel clearance and v-band flange seating to avoid rework. This is a practical repair choice if you want to keep a functioning turbo rather than replace the entire turbocharger assembly.
Best for: Risk-averse mainstream buyers seeking an affordable repair to restore factory-like turbo function without replacing the entire turbo assembly.
Less Ideal for: Drivers planning a long-term performance upgrade or those who prefer buying a full factory-quality turbo replacement should consider alternatives rather than this repair part.
- Direct replacement for common cracked wastegate/turbine-housing failures on 1.4T GM turbos
- Includes alignment pin to simplify mating the manifold to the turbo housing
- Cast construction matches the original function and withstands exhaust temperatures
- Frequently fits without modification according to multiple user reports
- Occasional manufacturing variation requiring machining or shimming for perfect v-band flange seating
- Not a complete turbo assembly so replacement assumes the turbo cartridge and compressor are in good condition
Verdict A cost-effective replacement manifold for fixing common wastegate cracks on 1.4T GM engines, but inspect fitment carefully before final assembly.
5. A-Premium Exhaust Manifold Kit with Gasket, Nuts and Bolts
| Material | Cast Iron |
|---|---|
| Fitment Type | Direct Replacement |
| Included Parts | Manifold, manifold gasket, flange gasket, 3 nuts, 3 bolts |
| Grade Type | Standard Replacement |
This A-Premium exhaust manifold kit is a cast-iron replacement that ships with a manifold gasket, flange gasket and the nuts and bolts needed for installation. It is designed as a direct replacement to restore the exhaust path and engine operation when the factory manifold has cracked or leaked. Typical use is a bolt-on swap performed by a mechanic or an experienced DIYer during exhaust or engine repairs. Cast-iron construction means good resistance to heat and corrosion and a robust feel compared with thin stamped parts. The inclusion of gaskets and hardware simplifies installation and reduces the chance of missing components. Reported issues include occasional misaligned bolt holes and a small number of early failures or damaged gaskets in transit, so inspect threads and gasket condition before fitment. Because fitment accuracy varies between batches, verify compatibility for a Buick Regal 2.4L and be prepared for minor rework or professional installation if alignment is off.
Best for: A balanced all-round buyer seeking a cost-effective factory-replacement style manifold for routine repairs who values a mostly complete kit and pragmatic reliability over OEM branding.
Less Ideal for: Users who need a guaranteed lifetime solution or exact factory-match without any possibility of fitment work should consider factory-quality or dealer-sourced alternatives.
- Cast-iron construction offers heat and corrosion resistance for longer service life compared with thin aftermarket pieces
- Includes manifold and flange gaskets plus nuts and bolts for a mostly complete install
- Sold as a direct-replacement design intended to restore proper exhaust sealing and engine function
- Multiple customer reports of correct fit and quieter operation after installation
- Some units have arrived with damaged or misshapen gaskets requiring reshaping before install
- Occasional reports of unthreaded or misaligned bolt holes requiring drilling or professional correction
- A few reviews cite early failure on some vehicles, so longevity may vary
Verdict A solid-value cast-iron replacement manifold that includes gaskets and hardware, suitable for practical repairs on a Buick Regal 2.4L but inspect fitment and hardware before installation.
Choosing the Right Buick Regal Exhaust Manifold: Key Factors to Consider
Fitment And Bolt Pattern
Correct fitment is essential because exhaust manifolds must align precisely with cylinder head ports and mounting studs to form a reliable seal. Mismatched bolt patterns or port shapes cause leaks, exhaust flow disruption, and installation headaches.
When assessing fitment, check that flange geometry and mounting locations match the Buick Regal engine variant you have. Even small deviations can require modifications or special gaskets, which increases labor and failure risk. Proper alignment also affects oxygen sensor placement and downstream exhaust components.
Material And Heat Resistance
Manifolds see very high temperatures and repeated thermal cycling, so material choice influences longevity and warp resistance. Cast iron is common for strength and heat tolerance, while certain stainless steels offer better corrosion resistance and lighter weight.
Consider coatings or heat treatments that reduce oxidation and thermal fatigue. Materials that resist cracking under repeated heating and cooling are likely to last longer and maintain a good seal with the head and gasket.
Sealing Design And Gasket Compatibility
How the manifold seals to the cylinder head matters for preventing exhaust leaks that harm performance and cause noise. A robust flange surface, consistent machining, and proper gasket match are critical to maintain an airtight connection.
Pay attention to whether the manifold design pairs with a specific gasket type and whether the flange faces are finished to accept that gasket without gaps. Good sealing design reduces the chance of exhaust manifold gasket failure and associated symptoms like ticking or decreased engine efficiency.
Warping And Crack Resistance
Thermal cycling can cause warping or cracking over time, producing exhaust leaks and performance loss. Look for manifolds with thicker flange sections, reinforced ribs, or casting practices that minimize stress concentrations.
Manufacturing quality that reduces internal stresses and promotes even heat distribution will lower the likelihood of cracks. Designs that facilitate even cooling and avoid sharp transitions are less likely to develop failure points over time.
Installation Practicality
Ease of installation affects labor time and the risk of incorrect assembly. Manifolds that allow access to mounting bolts, use standard fastener patterns, and align easily with studs reduce installation frustration.
Consider whether the manifold requires special hardware, whether studs or bolts must be reused, and if additional components like heat shields or sensors are straightforward to attach. Clear installation compatibility reduces the chance of leaks from misalignment.
FAQ
What are common exhaust manifold symptoms on a Buick Regal?
Common symptoms often include a loud ticking or tapping noise on cold start that may change with engine load, decreased engine responsiveness, and a noticeable exhaust odor in the engine bay. You may also see increased engine compartment heat and, in some cases, reduced fuel efficiency. These signs usually point to leaks, cracks, or gasket failure rather than unrelated engine faults.
How can I diagnose an exhaust manifold leak?
Diagnosis typically starts with listening for ticking or hissing noises from the exhaust area, especially during cold starts and acceleration. A visual inspection for soot or carbon deposits near the flange can indicate leak points. A controlled smoke test or using a handheld stethoscope can help pinpoint the exact location without major disassembly.
When is exhaust manifold replacement necessary?
Replacement is usually recommended when there is a visible crack, irreparable warp, or repeated gasket failures that recur after proper installation. If thermal damage has compromised flange flatness or a crack allows exhaust gases to enter the engine bay, replacement provides a more reliable long-term fix than repeated gasket changes.
Can a damaged exhaust manifold cause engine performance issues?
Yes. Leaks in the exhaust manifold can alter backpressure and oxygen sensor readings, which may cause rough idling, reduced power, and inefficient combustion. Addressing manifold leaks or cracks often restores normal sensor readings and engine behavior.
What should I expect during manifold installation?
Installation usually involves removing heat shields and other nearby components, carefully aligning the manifold, and torquing fasteners to specification to avoid distortion. You may need new gaskets and sometimes new mounting studs or bolts. Proper torque sequencing and using replacement gaskets designed for your engine help ensure a durable seal.
How We Chose the Best Buick Regal Exhaust Manifold
We shortlisted products based on factors that directly affect performance and long-term reliability on the Buick Regal. Primary filters included exact fitment to Buick Regal engine mounts and flange geometry, verified material and coating choices for heat and corrosion resistance, and proven sealing methods to reduce the chance of leaks. We prioritized manifolds with robust thermal management features such as heat shields or high-temperature finishes, and considered manufacturing tolerances that affect bolt alignment and ease of installation. Durability indicators like casting quality, warp resistance, and crack mitigation design were important for long-term value. We excluded options without clear fitment information for the Buick Regal, products lacking material or construction details, and any listings that did not specify gasket or flange compatibility. The final list balances fit, durability, thermal behavior, and installation practicality.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Buick Regal exhaust manifold, prioritize correct fitment, material durability, and sealing design. Those factors have the biggest impact on preventing leaks, avoiding cracks, and maintaining engine performance. Balance ease of installation with long-term thermal resistance. Addressing the root cause, such as a warped flange or compromised gasket surface, will reduce repeat repairs and restore normal exhaust function.
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