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If your Jeep Gladiator is showing signs of reduced performance or louder exhaust noise, choosing the right exhaust manifold matters. The correct manifold restores proper exhaust flow, controls heat, and prevents leaks that can affect engine performance and cabin comfort. This guide highlights our seven shortlisted Jeep Gladiator exhaust manifold options selected for fit and durability. We evaluated each choice using engine-fitment, heat tolerance, and sealing reliability to help you narrow options quickly. Read on for the key factors that drove our selections and what to look for next.
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 | MAHLE MS15510 Intake and Exhaust Manifold Combination Gasket |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Stainless Steel Exhaust Manifold Kit with Gaskets for Jeep 4.0L |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 674-392 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware) |  |
| Best Budget The cheapest option that still gets the job done reliably | Crown Automotive Exhaust Manifold Left 4666024AD |  |
| Most Sold A high-volume bestseller chosen again and again | RedRock Stainless Steel Tubular Exhaust Manifold/Header Kit |  |
| Best Value for Money The sweet spot between price and what you get | Dorman 674-905 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware) |  |
| Best Overall The best all-around choice for most situations | JDMSPEED Stainless Steel Exhaust Manifold and Gasket Kit for 4.0L Jeep |  |
1. MAHLE MS15510 Intake and Exhaust Manifold Combination Gasket
| Brand | MAHLE |
|---|---|
| Material | Oe Equivalent |
| Model | Exhaust Manifold Gasket |
| Exterior | Machined |
This MAHLE MS15510 is a one-piece intake and exhaust manifold combination gasket engineered to provide a factory-quality seal where the manifold meets the head. It installs like a single unit because the intake gasket is riveted to the metal exhaust gasket, which simplifies alignment during reassembly and reduces installation time. Typical use is replacement during manifold service or when correcting exhaust or intake leaks; the machined exterior and OE-equivalent materials aim to control blow-by and prevent exhaust leakage into the intake. Practically, the product saves effort by fitting cleanly without heavy scraping or sealant in many cases and is packaged to verify the part before opening. Limitations are that it is a direct replacement gasket rather than a performance upgrade and fit is specific to the mating surfaces, so correct application for the vehicle is essential. Buyers should expect a straightforward OEM-style repair rather than improved flow or power gains.
Best for: Reliability-focused buyers who prioritize a factory-quality, long-lasting repair and want a straightforward replacement that reduces installation fuss.
Less Ideal for: Drivers seeking performance gains, custom exhaust tuning, or universal-fit kits should look for purpose-built performance gaskets instead.
- Combination design with intake gasket riveted to exhaust gasket for easier alignment and installation
- Built to meet or exceed original equipment specifications for reliable sealing
- Machined exterior and OE-equivalent materials reduce likelihood of leaks when installed correctly
- Not a performance-oriented upgrade; intended as a factory-style replacement
- Fitment is specific to the vehicle mating surfaces and requires correct application to avoid leaks
Verdict A dependable, OEM-style combination manifold gasket that simplifies installation and restores factory sealing for reliability-focused repairs.
2. A-Premium Stainless Steel Exhaust Manifold Kit with Gaskets for Jeep 4.0L
| Fitment | Jeep 4.0L L6 (specified model years) |
|---|---|
| Material | Stainless Steel |
| Includes | Manifold, manifold gasket, flange gasket, bolts, nuts, washers |
| Grade Type | Standard Replacement |
This A-Premium kit replaces a cracked or worn exhaust manifold on Jeep 4.0L engines and ships with a manifold, manifold gasket, flange gasket and a small set of bolts, nuts and washers. It is typically used as a direct replacement when the original manifold develops leaks or cracks. The stainless steel construction and welded flex section aim to resist heat and reduce the cracking common to factory-style cast manifolds, while the included gaskets make installation quicker for a DIY swap. Reviewers report good fitment and flange straightness that lines up with factory ports, though a few buyers had to source stronger or different bolts and in some cases a higher-quality gasket for a long-lasting seal. The kit is a practical midline option for owners who want an affordable, ready-to-install replacement that improves durability over old cast pieces at the expense of sometimes needing to replace the supplied small hardware or gasket for best results.
Best for: Buyers who prioritize convenience and want a ready-to-install, midprice replacement that gets a Jeep 4.0L back on the road quickly without hunting for multiple parts.
Less Ideal for: Drivers seeking a long-term, high-performance aftermarket manifold or a fully OE-equivalent kit with premium hardware and heat shielding should consider higher-end options or sourcing upgraded gaskets and bolts separately.
- Stainless steel construction for improved heat resistance and corrosion protection over aging cast manifolds
- Designed to match factory port locations for straightforward bolt-up fitment on compatible 4.0L engines
- Includes manifold and basic gaskets so you can install it without sourcing every part separately
- Welded flex section and decent flange straightness reduce the likelihood of immediate cracking and leaks
- Included hardware and gasket quality can be inconsistent so replacement bolts or a premium gasket may be required
- Heat shield is not included, which some owners prefer for additional thermal protection
Verdict A convenient, budget-friendly stainless steel replacement that fits Jeep 4.0L engines well but may require upgraded hardware or gaskets for the most reliable long-term seal.
3. Dorman 674-392 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware)
| Manufacturer | Dorman Products |
|---|---|
| Model | 674-392 |
| Bolt Pattern (Number of Holes) | 12 |
| Exterior | Machined |
This Dorman passenger-side exhaust manifold is a full replacement kit engineered to match the fit and function of the original manifold and comes with the gaskets and downpipe hardware needed for installation. It is intended for specified older Jeep models and is built to resist warping and cracking, which helps maintain a proper exhaust seal and consistent performance under repeated heat cycles. Typical use is a repair or restoration where the factory manifold has developed leaks, cracks, or excessive warpage; the included hardware simplifies installing the part without sourcing additional components. Notable features include a machined exterior and a 12-bolt pattern to match the mating surfaces listed by the manufacturer. Practical benefits are a one-order solution for a complete repair and a design claimed to be reverse-engineered from factory parts for straightforward fitment. Limitations are that compatibility is limited to the specific Jeep model years listed by the manufacturer and this aftermarket unit may differ slightly in casting or finish from a factory replacement, which can matter to restoration purists.
Best for: Performance-oriented owners focused on restoring exhaust sealing and flow in an older Jeep and who prioritize a durable, ready-to-install replacement that reduces installation time.
Less Ideal for: Collectors seeking exact factory-original appearance or owners needing fitment for Jeep models outside the specific years listed should consider other options.
- Includes all required gaskets and downpipe hardware for a single-order, complete repair
- Precision-engineered replacement intended to match factory fit and function
- Durable construction designed to resist warping and cracking under heat
- Machined exterior and correct bolt pattern to simplify installation
- Compatibility limited to specific older Jeep models rather than universal application
- Aftermarket casting and finish may not exactly match original factory appearance
Verdict A complete, performance-minded replacement manifold kit that simplifies repair for the listed Jeep models while prioritizing durability and fit.
4. Crown Automotive Exhaust Manifold Left 4666024AD
| Vehicle Service Type | Car, Truck |
|---|---|
| Automotive Fit Type | Universal Fit |
| Exterior | Machined |
| Model | 4666024AD |
This Crown Automotive left-side exhaust manifold is a straightforward replacement intended to match factory fit and function on compatible Jeep Gladiator engines. It is a cast, machined manifold designed for bolt-on installation and aims to reproduce the factory mating surfaces so it lines up with the cylinder head and downpipe without extensive modification. Buyers can expect a basic, no-frills repair part that restores exhaust routing and prevents leaks when installed with fresh gaskets and hardware. The listing and customer feedback emphasize solid fitment and appearance similar to the original part, which makes this suitable for routine repairs. Important limitations are that this is a budget replacement rather than an upgraded performance piece, so it may not resist thermal cracking as long as higher-end units, and longevity can vary depending on driving conditions and installation quality. It does not include a bolt kit, so replacing hardware when reinstalling is recommended to avoid broken studs or fasteners.
Best for: Budget-conscious Jeep Gladiator owners looking for an affordable, factory-style replacement to get a vehicle back on the road quickly and keep maintenance costs low.
Less Ideal for: Owners seeking a long-term heavy-duty or performance upgrade for off-road use should consider higher-grade aftermarket manifolds designed for increased thermal durability.
- Designed to match factory fit for straightforward bolt-on replacement
- Machined exterior for good flange mating and alignment
- Positive buyer reports of easy installation and correct fit
- Budget cast construction may be more prone to cracking over long term compared with higher-end replacements
- Does not include replacement bolts or hardware
Verdict A cost-minded, factory-style left exhaust manifold that restores fit and function on a Jeep Gladiator but stops short of premium durability enhancements.
5. RedRock Stainless Steel Tubular Exhaust Manifold/Header Kit
| Material | Stainless Steel |
|---|---|
| Fit Type | Vehicle Specific Fit |
| Auto Part Position | Front Left Outer |
| Manufacturer | RedRock |
This RedRock exhaust manifold/header kit replaces the factory manifold on compatible Jeep Wrangler JK models with a mandrel-bent stainless steel tubular design intended to improve exhaust flow and engine breathing. It installs as a direct bolt-on using factory mounting points and includes gaskets and hardware to simplify replacement. Notable features are one-piece header flanges for stronger sealing and a bright chrome finish for corrosion resistance and appearance. In practice the kit is aimed at restoring performance lost to cracked or restrictive stock manifolds and can support both stock and aftermarket exhaust systems without extensive modification. Limitations to consider are that this is a vehicle-specific aftermarket part rather than a factory part, so fit can depend on exact engine/options and may require careful torqueing to factory spec to avoid leaks. The chrome finish helps longevity but will still experience wear under harsh conditions. For a risk-averse owner seeking a straightforward factory-style replacement that aims to reduce exhaust restriction, this kit presents a practical option with familiar install steps.
Best for: A risk-averse mainstream buyer who wants a direct, factory-style replacement to restore performance and reliability without experimental modifications; suitable for owners prioritizing dependable, straightforward repairs.
Less Ideal for: Not a good choice for buyers seeking maximum performance tuning or custom header designs, or for those who prefer OEM factory parts exclusively.
- Mandrel-bent stainless steel tubing for improved exhaust flow and corrosion resistance
- One-piece header flanges designed to provide consistent sealing and stronger fit
- Direct bolt-on design with included gaskets and hardware for straightforward replacement
- Compatible with factory or aftermarket exhaust systems for installation flexibility
- Fitment is vehicle-specific and may require careful checking against engine/options before purchase
- Chrome finish improves appearance but can show wear over extended high-heat use
Verdict A practical, bolt-on stainless steel header kit that targets improved exhaust flow and dependable replacement fitment for compatible Wrangler JK models.
6. Dorman 674-905 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware)
| Installation Type | Bolt-On |
|---|---|
| Automotive Fit Type | Universal Fit |
| Manufacturer | Dorman Products |
| Exterior | Machined |
This Dorman manifold is a bolt-on replacement designed to match the fit and function of the factory passenger-side exhaust manifold for specified vehicles. It is supplied with gaskets and downpipe hardware so you can complete the downstream connection without sourcing parts separately, which speeds repairs and reduces trips to the parts store. The unit is machined for a close fit and customers report it resists the common warping and ticking associated with worn Hemi manifolds. A few installers noted the casting can be slightly heavier and some bolt lengths may differ from factory hardware, so you may need to swap or trim fasteners during installation. Fitment requires confirming vehicle year and trim before purchase. This kit is practical for a garage repair where a reliable, ready-to-install replacement is preferred over searching for individual components, but expect minor fitment adjustments in some cases.
Best for: Practical optimizers who want a one-order repair solution that restores exhaust function quickly and keeps workshop downtime and parts chasing to a minimum.
Less Ideal for: Buyers who need a verified fit for Jeep Gladiator specifically or who want a guaranteed no-modification, drop-in part without checking vehicle-specific fitment should consider alternatives.
- Includes gaskets and downpipe hardware for a more complete repair
- Machined exterior aimed at close fit and leak resistance
- Designed as a direct replacement to restore factory-like function
- Durable construction intended to resist warping and cracking
- Does not include manifold-to-head bolts so some fasteners may need to be sourced separately
- Some units may require minor modifications or different bolt lengths during installation
Verdict A budget-friendly, ready-to-install passenger-side manifold kit that simplifies repairs but may require sourcing a few head bolts or minor fit tweaks.
7. JDMSPEED Stainless Steel Exhaust Manifold and Gasket Kit for 4.0L Jeep
| Replaces part numbers | 33007072, 4883385, 674-196, 10105812 |
|---|---|
| Included components | Manifold, gaskets, downpipe hardware, heat shield, flex bellows |
| Material (pipes) | Stainless steel |
This JDMSPEED manifold kit replaces the factory exhaust manifold on Jeep 4.0L engines and ships as a complete kit with gaskets, downpipe hardware, heat shield, and a flex bellows. The pipes are upgraded to stainless steel while the flex joints and flange remain standard steel to allow for thermal expansion, which should reduce cracking compared with all-steel aftermarket units. Its smooth internal tubing is intended to preserve high-rpm flow characteristics and the included heat shield and bellows help control heat and movement under load. In practice this is a typical bolt-on replacement for owners restoring quiet running and sealing to the exhaust on a 4.0L Jeep; several buyers report factory-like fit and reduced ticking after installation. Quality control appears mixed across units so expect to inspect welds and flange alignment before installation and consider better aftermarket gaskets for a durable seal. The kit offers strong value for a balanced buyer willing to trade occasional fitment tweaks for lower cost versus premium replacements.
Best for: A balanced all-round buyer who wants a cost-effective, mostly direct-fit replacement to restore a quiet, sealed exhaust on a Jeep 4.0L without paying for a premium branded manifold.
Less Ideal for: Buyers who need guaranteed perfect factory-level fit and finish or who prefer a premium QA-controlled aftermarket manifold should consider higher-end options.
- Complete kit with manifold, gaskets, downpipe hardware, heat shield, and flex bellows for one-stop replacement.
- Stainless steel pipes improve corrosion resistance compared with plain steel tubing.
- Smooth internal tube profile aimed at preserving engine flow at higher rpm.
- Includes flex joints to accommodate thermal expansion and reduce cracking risk.
- Fitment and weld quality are inconsistent across some units so parts may require inspection or minor adjustment.
- Some buyers reported supplied gaskets were low quality and recommend buying higher-quality gasket replacements.
Verdict A value-oriented, mostly direct-fit replacement manifold for the Jeep 4.0L that balances improved corrosion resistance and a complete kit against occasional fitment and gasket-quality issues.
Choosing the Right Jeep Gladiator Exhaust Manifold: Key Factors to Consider
Engine Fitment and Bolt Pattern
Correct fitment to the Jeep Gladiator engine is essential because manifold mounting holes, flange shape, and port alignment must match the cylinder head to form a tight seal. A mismatch can cause exhaust leaks, noisy operation, and poor engine performance.
Checking bolt pattern and port layout matters before purchase. Manifolds designed specifically for the Gladiator eliminate the need for custom adapters and reduce installation time. Fitment also affects downstream components such as oxygen sensors and the connection to the exhaust pipe, so verify sensor bung placement and pipe flange compatibility.
Material and Thermal Resistance
Exhaust manifolds are exposed to extreme temperatures and thermal cycling, so material choice directly affects longevity. Cast iron and high-grade stainless steels resist warping and cracking when subjected to repeated heating and cooling cycles, helping maintain a consistent seal.
Heat-resistant coatings or ceramic finishes can reduce radiant heat in the engine bay and improve corrosion resistance. Consider how the material handles long-term exposure to heat and road salt for the driving conditions you expect.
Sealing Design and Gasket Compatibility
A reliable seal at the flange and between mating surfaces prevents exhaust leaks that produce noise, reduce efficiency, and can allow exhaust gases into the cabin. Look for manifolds with flat, machined flanges and well-supported mating surfaces that compress gaskets evenly.
Compatibility with OEM-style exhaust manifold gaskets or widely available replacements simplifies maintenance. Designs that minimize uneven flange pressure and that offer replaceable gasket surfaces will usually provide better long-term sealing.
Crack Resistance and Structural Stiffness
Cracks typically start at high-stress points and along thin sections. Manifolds with robust wall thickness, strategic ribbing, or cast construction tend to resist stress-related cracking better than thin, lightweight alternatives.
Structural stiffness also affects how the manifold responds to vibration and engine movement. A manifold that flexes less will keep bolts under more consistent load and maintain the integrity of the seal over time.
Installation Complexity
Ease of installation affects cost in time and potential labor. Some manifolds require removal of adjacent components or the use of specialty tools, while others replace the factory unit with minimal disassembly.
Consider whether the design uses factory mounting points, the accessibility of bolts, and whether the oxygen sensor bungs are pre-tapped. If you plan to install the manifold yourself, choose a design that matches your mechanical comfort level and required toolset.
Corrosion Protection and Finish
Exposure to moisture and road chemicals can corrode manifolds over time, so finishes and coatings matter. High-temperature paints, ceramic coatings, and stainless construction all offer varying levels of corrosion resistance.
A protected surface reduces the chance of premature failure and keeps the manifold functioning cleanly. For drivers in humid or coastal regions, prioritize corrosion-resistant finishes to extend service life.
FAQ
What are common exhaust manifold symptoms to watch for on a Jeep Gladiator?
Common symptoms often include louder exhaust noise near the engine, a ticking or hissing sound during startup or acceleration, and a noticeable loss of low-end torque. You may also detect a strong exhaust smell inside the cabin when a flange seal is compromised. These signs usually indicate a leak, crack, or failing gasket that deserves inspection.
How do I diagnose an exhaust manifold leak on a Jeep Gladiator?
Diagnosis often starts with a visual inspection for soot marks or obvious cracks along the flange and runners. With the engine cold, you can check for loose bolts and gasket gaps. When safe, a running-engine test can reveal ticking noises that change with RPM. Professional shops may use smoke or pressure tests to confirm leak locations when the issue is hard to see.
When should I consider exhaust manifold replacement rather than repair?
Replacement is usually appropriate when there are visible cracks, severe warping, or repeated gasket failures that indicate the mating surfaces are compromised. Minor flange damage or small gasket issues can sometimes be repaired, but extensive structural damage or recurrent leaks often justify a full replacement for reliability.
How does a cracked manifold affect engine performance?
A crack allows exhaust gases to escape before they reach the downstream exhaust components, which can reduce backpressure balance and affect sensor readings. That can lead to reduced torque, rough idling, or poorer throttle response. The severity depends on crack size and location, but early attention helps prevent more extensive issues.
What should I expect from exhaust manifold installation complexity?
Installation complexity depends on access to the manifold bolts, whether other components need removal, and if sensor locations line up. Some installations are straightforward bolt-on replacements using factory mounting points, while others require more disassembly or torque-sequence steps. Budget time for careful bolt tightening and gasket seating for a reliable result.
Are there tradeoffs between different manifold materials?
Yes. Cast iron provides excellent durability and heat retention but can be heavier and more prone to surface rust. Stainless steel is lighter and more corrosion-resistant but may require thicker sections or special fabrication to avoid cracking. Coated options reduce radiant heat but add cost and require proper surface prep for longevity.
How We Chose the Best Jeep Gladiator Exhaust Manifold
To assemble this list we applied practical, vehicle-specific filters focused on long-term fit and function. First, we limited candidates to designs confirmed to fit the Jeep Gladiator’s engine layout and mounting points to avoid fitment surprises. Second, we prioritized manifolds made from materials and coatings that withstand high under-hood temperatures and resist warping and cracking. Third, sealing reliability was a major factor, so we considered flange design and compatibility with standard exhaust manifold gaskets. Fourth, we looked at ease of installation, including whether the design requires special adapters or major disassembly. Fifth, corrosion resistance and finish were included to ensure durability in wet and salty environments. We excluded products that required extensive engine modification, nonstandard header swaps, or unproven one-off designs. We also left out options without clear documentation on fitment or heat performance. The result is a focused list that balances fitment, thermal durability, sealing, and installation practicality for the Jeep Gladiator.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Jeep Gladiator exhaust manifold, prioritize correct engine fitment, material durability, and a flange design that ensures a consistent seal. These factors most directly affect noise, performance, and long-term reliability. Balance installation complexity and corrosion resistance with the thermal demands of your use. Addressing symptoms early and selecting a manifold that matches the Gladiator’s mounting and sensor locations will minimize repeated repairs and help maintain engine performance.
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