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Picking the right Jeep Gladiator intake manifold matters because it directly affects airflow, throttle response, and engine efficiency. A well-chosen manifold can reduce rough idle, improve transient throttle behavior, and support performance upgrades while maintaining reliable fitment. This guide covers our shortlist of the top options for the Gladiator, and explains the evaluation criteria we used, including fitment accuracy and airflow characteristics. Read on to understand the factors that matter before you pick an intake manifold for your vehicle.
Looking for other parts? See all Jeep Gladiator parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | FORRIE Lower Intake Manifold (fits select Chrysler/Dodge/Jeep/Ram) |  |
| Most Popular A crowd favorite that many people choose with confidence | MITZONE Aluminum Lower Intake Manifold with Gasket Kit |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 615-914 Lower Intake Manifold with Gaskets |  |
| Best Budget The cheapest option that still gets the job done reliably | LLNSEAUTO Lower Intake Manifold with Gasket and Hardware |  |
| Most Sold A high-volume bestseller chosen again and again | MITZONE Intake Manifold with Gasket for 3.6L Pentastar V6 |  |
| Best Value for Money The sweet spot between price and what you get | AUTOBABA Aluminum Lower Intake Manifold with Gasket and Bolts |  |
| Best Overall The best all-around choice for most situations | MITZONE Intake Manifold with Flow Control Valve (replacement) |  |
1. FORRIE Lower Intake Manifold (fits select Chrysler/Dodge/Jeep/Ram)
| Manufacturer | FORRIE |
|---|---|
| OE reference part no. | 05184199AF |
| Item model number | 119 |
| ASIN | B09WCRJ45M |
This FORRIE lower intake manifold is a direct-replacement unit intended to restore intake sealing and airflow on compatible engines. It installs where the factory lower manifold sits and is typically used to replace a cracked or leaking original part during routine engine repairs. The listing notes an integrated gasket and precision molding to match the factory fit, and customer reports indicate straightforward bolt-on installation with included seals. In practical use the manifold can stop coolant or vacuum leaks and, when properly torqued, return normal driveability and fuel economy. Limitations to consider are material durability under repeated disassembly and heat cycling compared with aluminum alternatives, so careful torque control and correct installation practice are important. Fitment must be verified for the Gladiator application before ordering and occasional thread or boss damage has been reported when reinstalling multiple times.
Best for: A reliability-focused buyer who prioritizes restoring factory performance and sealing on a Gladiator without paying dealer pricing; ideal for owners who prefer practical, cost-effective repairs and will follow correct installation procedures.
Less Ideal for: Not ideal for owners planning frequent disassembly or heavy-duty, high-heat modifications who should consider higher-durability aftermarket materials or upgraded parts.
- Designed as a direct-fit factory-quality replacement for compatible engines
- Integrated gasket included for a simpler install and proper sealing
- Multiple user reports of easy installation and restored fuel economy/driveability
- Plastic construction can be more vulnerable to heat and repeated disassemblies compared with metal alternatives
- Some users reported stripped threads or weakened bolt bosses after reinstallations
Verdict A budget-friendly, direct-fit lower intake manifold that restores sealing and drivability for Gladiator owners but requires careful installation and torque control to avoid repeat repairs.
2. MITZONE Aluminum Lower Intake Manifold with Gasket Kit
| Brand | MITZONE |
|---|---|
| Model | 009-167ALU |
| Exterior | Aluminum |
| OEM Part Number | 5184199AD 5184199AE 5184199AF |
This aluminum lower intake manifold kit replaces the factory lower intake on compatible 3.6L and 3.2L V6 vehicles and ships with gaskets and mounting bolts. In use it swaps into place of the original plastic lower manifold to address oil leaks and cracked housings that commonly develop; aluminum construction reduces heat-related distortion and can provide a firmer sealing surface. The kit includes hardware so you can perform the job in one visit to the garage, and multiple owners report straightforward installation when torqued in sequence. Practical benefits are improved durability over the stock plastic lower manifold and a reduced risk of repeat leaks if installed and torqued correctly. Limitations to be aware of are variable bolt quality and gasket fitment reported by some buyers, so you may prefer to reuse good OEM fasteners or fit higher-quality gaskets during the repair. Professional installation is recommended if you are not comfortable verifying torque and vacuum seals.
Best for: Convenience-driven buyers who value a one-stop replacement that reduces repeat visits to the shop and prefers a longer-lasting fix over a quick temporary patch.
Less Ideal for: Drivers seeking a brand-new factory OEM part or those who prefer to swap only individual components should consider dealer or OEM replacements instead.
- Aluminum construction resists heat and cracking compared with plastic lower manifolds.
- Kit includes gaskets and bolts so the repair can be completed without sourcing extra parts.
- Designed as a direct replacement to match factory fit and mounting points.
- Multiple user reports of easy, bolt-on installation when following torque sequence.
- Some buyers reported inconsistent gasket quality that required replacement.
- Included bolts have mixed reports of fit or strength compared with factory fasteners.
Verdict A practical, bolt-on aluminum lower intake manifold kit that replaces the fragile plastic part to reduce leaks and service visits, but consider replacing the gaskets or using factory fasteners for best results.
3. Dorman 615-914 Lower Intake Manifold with Gaskets
| Brand | Dorman |
|---|---|
| Model | 615-914 |
| Manufacturer Part Number | 615-914 |
| OEM Part Number | 5184199AD; 5184199AE; 5184199AF |
This Dorman lower intake manifold is a precision-engineered factory-replacement designed to restore the intake runner path and mounting interfaces on vehicles that use this part. It installs in place of the original manifold and is intended for engine repairs or rebuilds where the stock manifold is cracked, warped, or leaking. Notable features include tested construction to meet factory-style fit and the inclusion of gaskets for a single-source repair. For performance-focused Jeep owners, a correctly fitting manifold is essential to maintain consistent airflow and engine vacuum, and this part aims to deliver that without major modification. Practical benefits are straightforward: it saves the time and cost of sourcing an OEM unit and can get a vehicle back on the road with factory-quality dimensions. Limitations to consider are mixed user reports about quality control and molding cleanup on some pieces, plus one report of cracking under high torque during installation, so careful inspection and correct fastener torque are important before install.
Best for: Performance-oriented buyers who prioritize restoring factory airflow and fitment quickly when repairing a Jeep intake system and who plan to validate parts before installation.
Less Ideal for: Users seeking a flawless, out-of-the-box performance upgrade or a guaranteed non-plastic OEM source should consider Mopar or aftermarket aluminum performance manifolds instead.
- Engineered to match factory fit and function for specified applications
- Includes gaskets to simplify a single-source replacement
- Backed by a manufacturer with aftermarket repair focus and broad catalog
- Designed to restore proper intake runner alignment and sealing for reliable engine operation
- Some users reported molding defects or obstructed ports that required cleanup
- At least one report of cracking under torque during installation indicating variable quality control
- Packaging or kit contents have been reported inconsistent in a few cases
Verdict A practical factory-style replacement that restores intake function for performance-focused Jeep repairs but warrants pre-install inspection due to some quality variability.
4. LLNSEAUTO Lower Intake Manifold with Gasket and Hardware
| Manufacturer | LLNSEAUTO |
|---|---|
| Manufacturer Part Number | 5184199AF |
| Engine | 3.6L V6 |
| Includes | Lower manifold, gaskets, bolts |
This LLNSEAUTO lower intake manifold is a cost-focused replacement intended to restore proper air and coolant routing on 3.6L V6 Chrysler-family engines. It ships with the lower manifold, multiple upper and lower gaskets and the mounting bolts, so you can remove the old unit and install the replacement without sourcing separate hardware. Typical use is direct replacement when you have vacuum or coolant leaks, check-engine codes tied to the intake, or visible manifold damage. Buyers report it fits and seals well on compatible engines and lets the vehicle run normally after installation. As a budget option the casting and finish are utilitarian rather than premium, so careful inspection and proper torqueing of fasteners during installation are important. It is a practical, inexpensive path to repair but professionals or experienced DIYers should verify mating surfaces and follow factory torque sequences to avoid leaks or issues down the road.
Best for: Budget-conscious owners seeking an affordable, straightforward replacement to repair intake-related leaks or check-engine issues on a compatible Jeep Gladiator with a 3.6L V6.
Less Ideal for: Owners looking for a lifetime-durable performance upgrade or precision-machined part should consider higher-end aftermarket or factory-quality replacements instead.
- Complete kit includes lower manifold, upper and lower gaskets, and mounting bolts for a one-stop replacement.
- Designed for Chrysler-family 3.6L V6 engines so it fits common mounting points and passages on compatible vehicles.
- Multiple customer reports of straightforward fit and restored engine operation after installation.
- Build and finish are basic compared with higher-end aftermarket or factory units.
- Does not include explicit vehicle-specific instructions so professional installation or a service manual is recommended.
Verdict A low-cost, complete replacement manifold that restores function on compatible 3.6L V6 Jeep Gladiator engines but trades premium finish for affordability.
5. MITZONE Intake Manifold with Gasket for 3.6L Pentastar V6
| Brand | MITZONE |
|---|---|
| Model | Intake Manifold |
| Exterior | ABS |
| Position | Inside |
This MITZONE intake manifold is a direct-replacement lower intake designed for 3.6L Pentastar V6 engines and ships as a kit with gasket and bolts. It is typically used to replace a cracked or leaking factory lower intake to stop oil and coolant leaks and restore normal engine sealing. The manifold is molded from ABS and marketed as thermally stable to resist warping under engine heat. In real-world use buyers report straightforward installation, included hardware that can save a trip to the parts store, and reliable sealing when torqued correctly. Some customers found the supplied gaskets or bolts inconsistent and swapped in factory parts, so keep OEM spares on hand if you want extra assurance. Performance-wise it simply restores factory function rather than improving power. For a risk-averse owner needing a like-for-like replacement, this offers a practical, lower-cost option compared with dealer parts but requires careful torque and inspection during install to avoid stripped fasteners or leaks.
Best for: Practical, risk-averse buyers who prioritize restoring factory reliability at lower cost and want a ready-to-install replacement that minimizes downtime.
Less Ideal for: Owners seeking performance upgrades or verified OEM-sourced parts for warranty-sensitive restorations should consider factory replacements instead.
- Designed as a direct-fit replacement for 3.6L Pentastar V6 applications, simplifying installation
- Includes gasket and bolts so you get a complete lower intake kit out of the box
- ABS construction intended to resist high-temperature deformation and leakage
- Multiple user reports of good fit and resolution of leak-related engine codes
- Some buyers reported inconsistent gasket quality and preferred to reuse or replace with OEM gaskets
- A few customers found the supplied bolts did not match original hardware and used factory bolts instead
Verdict A budget-friendly, direct-fit lower intake kit for 3.6L Pentastar engines that restores sealing and function but may require swapping in OEM gaskets or bolts for extra peace of mind.
6. AUTOBABA Aluminum Lower Intake Manifold with Gasket and Bolts
| Brand | AUTOBABA |
|---|---|
| Manufacturer Part Number | 5184199AF |
| Fits Engine | 3.6L V6 |
| Package Includes | Intake manifold, 12 gaskets, M6 and M5 bolts |
This AUTOBABA lower intake manifold replaces the factory plastic plenum with a full aluminum unit and ships with gaskets and a set of mounting bolts for installation. In real-world use it serves as a direct replacement part that resists heat and corrosion better than stock plastic designs, and reviewers report straightforward fitment and reliable operation after installation. The kit includes multiple gaskets and both M6 and M5 bolts so you can reassemble the intake without hunting down hardware, though some installers recommend cleaning threads and pre-checking bolt lengths before final torque. Practical benefits are improved durability and the convenience of a mostly complete hardware package; a few users note the cast port openings may need a light cleanup and that the supplied washers or some long bolts can require attention during reassembly. This is a budget-smart upgrade for owners who want a stronger factory-replacement lower intake without modifying the engine or fueling system.
Best for: Practical optimizers looking for a durable, factory-replacement upgrade that extends service life without aftermarket performance modifications.
Less Ideal for: Buyers seeking performance gains beyond stock airflow or those who prefer a completely pre-polished, ready-to-run performance manifold should consider dedicated performance options instead.
- Full-aluminum construction improves strength and heat resistance compared with plastic lower plenums
- Includes gaskets and a comprehensive set of M6 and M5 bolts so most hardware is ready for installation
- Multiple user reports of correct fitment and straightforward installation on compatible vehicles
- Some ports show cast flash and may need light internal cleanup before installation
- A few customers found supplied washers or certain long bolts awkward for reassembly and sourced replacements
Verdict A cost-effective, durable aluminum lower intake that replaces the plastic plenum and includes most hardware, making it a practical value upgrade.
7. MITZONE Intake Manifold with Flow Control Valve (replacement)
| Brand | MITZONE |
|---|---|
| Model | with Baffle & control valve, no sensor |
| Manufacturer Part Number | 009-056-1 |
| Position | Inside |
This intake manifold replaces a factory unit and is supplied with the gasket, bolts, and a flow control valve so you can complete the swap in one job. It is marketed as an upgraded material intended to resist high temperatures and keep runners stable so the manifold does not warp under heat. In practice the molded passages and included gasket make installation straightforward for a routine engine repair and reviewers report good fitment when matched to the correct application. The main practical benefit is the bundled hardware and valve which simplifies a single-source replacement without chasing parts. Limitations to note are consistency and longevity of the included flow control valve and runner components; several users report the valve failing sooner than expected, so plan to test the valve or replace it with a higher-quality unit if durability is critical. Fitment must be verified for the Gladiator application before ordering and professional installation is recommended if you are not experienced with intake systems.
Best for: A balanced, all-round buyer who wants a full replacement kit to restore intake function without sourcing separate parts and who prioritizes fit and convenience over OEM-only components.
Less Ideal for: Drivers who demand long-term, worry-free durability from every valve should consider sourcing a higher-grade control valve or a factory-quality manifold instead.
- Complete kit includes manifold, gasket and bolts so you have what’s needed for a one-job replacement.
- Upgraded material construction intended to resist heat-related deformation.
- Precision-formed intake passages for consistent air/fuel mixture distribution.
- Reported to fit factory mounting points and bolt pattern on compatible Jeep applications.
- Included flow control valve and runner hardware have inconsistent longevity according to multiple user reports.
Verdict A convenient, full-kit replacement that fits factory mounting points but consider upgrading the included flow control valve for better durability.
Choosing the Right Jeep Gladiator Intake Manifold: Key Factors to Consider
Fitment And Port Alignment
Correct fitment and accurate port alignment determine whether the manifold seals properly to the cylinder head and interfaces cleanly with existing throttle bodies and sensors. Poor alignment can cause air leaks, uneven airflow distribution, and installation headaches. Ensure the manifold matches the Gladiator's intake flange pattern and that bolt hole locations and clearances are verified. A design that preserves factory sensor positions helps avoid reworking wiring or vacuum lines. When port profiles differ from the head's openings, airflow turbulence and reduced performance can result. Check whether the manifold uses individual runners or a shared plenum and how the transition zones are shaped. Ease of installation also matters; clear access to fasteners and integrated mounting points for brackets and components reduce labor time and potential for improper torqueing.
Material And Thermal Properties
Manifold material affects durability, heat soak, and weight. Cast aluminum is common for its strength and thermal conductivity, while composites can reduce heat transfer into the intake charge. Consider how the material handles under-hood temperatures and whether it warps or deforms with repeated heating cycles. Thermal properties influence intake air temperature, which in turn affects power and detonation margins. Designs that include thermal isolation or finishing treatments help keep intake air cooler. Also weigh long-term corrosion resistance and susceptibility to cracking, especially if the vehicle sees heavy use or exposure to harsh environments.
Plenum And Runner Design
Plenum volume and runner length shape torque and power characteristics. Larger plenums and straighter, shorter runners generally favor high-rpm power, while longer, tuned runners can boost low-end torque and throttle response. Match the manifold's internal geometry to how you use the Gladiator: towing and daily driving benefit from strong low- to mid-range response; performance-focused builds may prefer a design that supports higher-rpm airflow. Also consider whether the design promotes even distribution to each cylinder. Smooth transitions, minimal restrictions, and consistent runner cross-sections reduce turbulence and help maintain balanced fueling and combustion.
Sealing And Gasket Interface
A reliable seal between the manifold and head is essential to prevent vacuum leaks and maintain consistent engine operation. Inspect the manifold's sealing surface finish and whether it requires a specific gasket type or torque sequence. Good gasket design compensates for minor surface irregularities and resists compressive set over time. Fastener layout and recommended torque specs influence how evenly the gasket compresses. Some manifolds incorporate raised lips or integrated sealing features to simplify installation. Consider how easy it will be to replace the gasket and whether replacement seals are readily available.
Compatibility With Sensors And Accessories
Maintaining functionality of the throttle position sensor, MAP or MAF sensors, PCV system, and vacuum lines is critical for drivability and emissions. Check that the manifold provides mounting points or boss locations for required sensors and that vacuum ports are placed for easy routing. If the manifold removes or relocates stock bosses, understand how that will affect sensor calibration and engine management. Accessory compatibility extends to heat shields, intake tube clearance, and any engine covers. A design that integrates these considerations reduces the need for aftermarket adapters or custom hoses.
Serviceability And Installation
Ease of installation and future maintenance matters to most owners. Look for manifolds with accessible fasteners, clearances for common tools, and uncomplicated vacuum line routing. Designs that require minimal additional parts or cutting down existing components reduce install time and potential for errors. Serviceability also includes how simple it is to clean carbon buildup or replace gaskets. Consider whether the manifold requires engine removal for certain maintenance tasks or if it can be serviced in place. Availability of installation instructions and torque specs helps ensure a correct and durable installation.
FAQ
How do I know if my Jeep Gladiator intake manifold is failing?
Common signs often include rough idle, reduced throttle response, fluctuating RPMs, or a noticeable loss of low-end torque. You may also detect hissing sounds indicating a vacuum leak. Symptoms can vary depending on whether the issue is a gasket failure, crack, or a sensor-related problem.
Can I replace the intake manifold myself on a Gladiator?
Many mechanically inclined owners can handle the job with basic tools and a clear set of instructions. Expect to follow a specific torque sequence, disconnect vacuum lines and sensors, and ensure proper gasket seating. If you are uncomfortable with engine work or lack the required tools, professional installation reduces the risk of leaks or incorrect assembly.
Will a different intake manifold affect engine tuning or sensors?
Yes, changes to airflow characteristics or sensor locations can alter how the engine computer manages fueling and timing. Most modern engines adjust for moderate changes, but significant differences may require calibration or a tuning update to optimize performance and avoid drivability issues.
How can I check for an intake manifold vacuum leak?
A common approach is to listen for hissing around the intake area while the engine is idling and use a smoke source or spray a safe aerosol around gasket seams to see if idle changes. Pressure and vacuum testing methods provide a more definitive diagnosis. Always follow safe procedures and consult a service manual for vehicle-specific steps.
Does the intake manifold material make a big difference?
Material influences heat transfer, weight, and long-term durability. Composites can reduce heat soak and weight, while metal options are often more robust and resist warping. The practical impact depends on driving conditions and whether you plan additional engine modifications.
How important are torque specs when installing the manifold?
Following the correct torque sequence and specifications is crucial to achieve a uniform seal and prevent warping or gasket failure. Uneven or incorrect torqueing can lead to vacuum leaks and poor engine performance. Use a calibrated torque wrench and the manufacturer-recommended values when available.
How We Chose the Best Jeep Gladiator Intake Manifold
We prioritized parts that deliver precise fitment for the Jeep Gladiator and measurable improvements in airflow or engine breathing. Key evaluation criteria included the manifold's port alignment and sealing approach, overall airflow design and plenum volume, compatibility with stock sensors and throttle bodies, and the quality and accessibility of mounting surfaces for routine maintenance. We also considered material durability, heat management, and how the manifold design affects intake tract temperature. We excluded options that required extensive fabrication, nonstandard engine modifications, or that lacked clear installation guidance for the Gladiator. Our focus was on manifolds that balance daily drivability with upgrade potential, favoring solutions that simplify installation and maintain factory vacuum and sensor function. The resulting list reflects parts that meet both practical fitment standards and performance-minded airflow goals.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right Jeep Gladiator intake manifold comes down to matching fitment and internal geometry to your driving goals. Prioritize correct port alignment and sealing for reliable operation, then weigh plenum and runner design based on whether you need low-end torque or higher-rpm airflow. Consider material, sensor compatibility, and ease of installation as practical tradeoffs. If you plan tuning or other engine changes, factor in how the manifold will interact with sensors and fueling adjustments so you get the desired performance without compromising drivability.
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