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If your Highlander is showing signs of reduced power, unusual noise, or visible exhaust leaks, choosing the right exhaust manifold matters for everyday driving and long-term engine health. This guide spotlights seven shortlisted Toyota Highlander exhaust manifolds selected for their fit and durability. You will see why factors like material, heat resistance, gasket compatibility, and installation practicality determine which option works best for your needs. Read on to compare the key attributes used to evaluate these top picks.
Looking for other parts? See all Toyota Highlander parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Dorman 674-803 Exhaust Manifold Kit with Gaskets and Hardware |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman Exhaust Manifold Kit with Gaskets and Hardware (674-164) |  |
| Best Quality Built to a higher standard if you want something more solid | AngyMeck Exhaust Manifold and Gasket Kit for 1995–2001 Toyota Tacoma/4Runner/T100 |  |
| Best Budget The cheapest option that still gets the job done reliably | Toyota Manifold-to-Head Exhaust Gasket (17173-28010) |  |
| Most Sold A high-volume bestseller chosen again and again | A-Premium Exhaust Manifold Catalytic Converter Kit for Toyota Highlander 2.4L (2001–2003) |  |
| Best Value for Money The sweet spot between price and what you get | A-Premium Cast Iron Exhaust Manifold Kit with Gasket, Bolts and Heat Shield |  |
| Best Overall The best all-around choice for most situations | PHILTOP Catalytic Converter Kit for Toyota 4.0L (Tacoma/4Runner/FJ Cruiser/Tundra) |  |
1. Dorman 674-803 Exhaust Manifold Kit with Gaskets and Hardware
| Manufacturer | Dorman Products |
|---|---|
| Model | Dorman 674-803 |
| Position | Center |
| Includes | Gaskets and downpipe hardware |
This Dorman manifold kit is a direct replacement designed to match the fit and function of the factory exhaust manifold on specified vehicles and arrives with the gaskets, bolts, springs, and downpipe hardware needed to finish the job in one go. It is typically used when a cracked, warped, or leaking manifold needs replacing; installers report it fits well and simplifies repair by bundling hardware that is often corroded on older cars. Notable features include reverse-engineered fitment to match factory mounting points, pre-welded construction, and a protective coating that may need cleaning before installation to avoid initial smoking. Practical benefits are reduced parts sourcing time and a lower cost alternative to factory parts. Important limitations are occasional quality control issues reported by some buyers, including broken welds or a misfit flange on rare units, and mixed experiences with customer support for missing pieces. For a reliability-focused repair this kit can restore a proper seal and get a car back on the road quickly, but inspect welds and mating surfaces during installation and be prepared to address minor fitment fixes if needed.
Best for: Reliability-focused buyers who prioritize restoring factory-level sealing and function with a single repair kit and want a practical, lower-cost replacement that minimizes repeat visits.
Less Ideal for: Buyers seeking premium performance upgrades or guaranteed flawless fitment without any minor adjustments should consider higher-end or factory-sourced options instead.
- Includes all necessary gaskets and downpipe hardware for a one-order complete repair
- Designed to match factory mounting points for straightforward installation
- Durable-looking welded construction with protective coating to resist corrosion
- Bundled kit saves time sourcing separate parts and often lowers total repair cost
- Some customers reported broken welds or dimensional inconsistencies on a small number of units
- Not all boxes consistently include every advertised gasket or part according to a few user reports
Verdict A convenient, reliability-minded replacement kit that bundles the parts needed for a factory-style manifold repair but requires inspection for occasional quality or fit issues.
2. Dorman Exhaust Manifold Kit with Gaskets and Hardware (674-164)
| Position | Front |
|---|---|
| Bolt Pattern (Number of Holes) | 4 |
| Manufacturer Part Number | 674-164 |
| Compatible Models | Select Toyota Corolla and Celica (see fitment) |
This Dorman manifold kit is a ready-to-install replacement that aims to match the fit and function of the factory unit for the compatible engines listed. It is supplied with all gaskets and downpipe studs and nuts so you can replace the manifold and mate it to the exhaust pipe without sourcing extra parts. Typical use is a direct swap when an original manifold has cracked or begun leaking; the kit is intended to simplify the repair and reduce downtime. Review notes and product details indicate a cast manifold with painted exterior, reverse-engineered for fit, and that Dorman tests to meet emissions and durability expectations. In practice buyers report mostly straightforward fitment and fewer trips to the parts store, although a few installations have required reuse of older hardware or minor fitting work around hard-to-access bolts. Some users experienced issues with heat resistance of supplied gaskets or broken studs under high heat, so careful torqueing and inspection of the supplied hardware during installation is wise. This kit is useful when you want a one-box repair solution but should be installed with attention to fastener condition and gasket seating.
Best for: Drivers who prioritize convenience and want a single-purchase repair kit to get a cooled-down exhaust manifold replacement completed quickly and with minimal parts-sourcing hassle.
Less Ideal for: Owners seeking an exact factory-original part finish or those who plan extreme performance or long idle-heavy duty where upgraded high-heat hardware would be preferable.
- Includes necessary gaskets and downpipe hardware for a single-order repair
- Designed to match factory fit and mounting points for specified applications
- Painted finish and cast construction resist warping and cracking under normal use
- Simplifies repairs by supplying multiple donut gaskets to cover different exhaust pipe connections
- Some buyers reported studs or supplied hardware failing under prolonged high-heat cycles
- A few installations required reuse of original nuts or minor modification for bolt access
Verdict A convenient, all-in-one replacement manifold kit that speeds repairs for compatible Toyota applications but warrants careful attention to supplied hardware during installation.
3. AngyMeck Exhaust Manifold and Gasket Kit for 1995–2001 Toyota Tacoma/4Runner/T100
| Compatible Years/Models | 1995-2001 Tacoma, 1996-2000 4Runner, 1994-1998 T100 |
|---|---|
| Material | Cast Iron |
| Placement on Vehicle | Front |
| Fitment Type | Direct Replacement |
| Gasket Included | Yes |
This AngyMeck exhaust manifold and gasket kit is a direct-replacement cast-iron manifold intended to restore the exhaust flow and sealing on compatible Toyota 4-cylinder engines. It is typically used when the factory manifold is cracked, leaking at the flange, or when replacing a failed gasket; the kit includes the manifold and a matching gasket to simplify installation. The cast-iron construction provides durability and heat resistance similar to factory-quality parts, and customer feedback indicates consistent fit and reliable sealing when part numbers match. Some units show rough internal casting and sharp edges that may require light cleaning or filing before installation, and a few buyers noted small adjustments were needed for perfect alignment. The product is sold as a front placement direct replacement and is supported by a one-year warranty, making it a practical option for repairs where OEM-like fitment is the priority. Expect basic finishing work during install and verify part numbers carefully before ordering.
Best for: Performance-oriented buyers who prioritize restoring factory-level exhaust sealing and durability with a direct-fit replacement to maintain engine performance under normal and spirited driving.
Less Ideal for: Buyers seeking a polished performance upgrade or custom header for increased flow should consider aftermarket performance manifolds instead.
- Direct replacement fitment designed for specified Toyota 4-cylinder models, simplifying installation.
- Cast-iron construction offers durability and heat resistance comparable to factory parts.
- Kit includes manifold gasket so you can replace the manifold and seal in one job.
- Multiple customer reports of good fit and function on compatible vehicles.
- Interior finish can be rough with burrs or sharp spots that may need cleanup before installation.
- Not explicitly listed for Toyota Highlander so fitment must be confirmed against vehicle part numbers.
Verdict A durable, factory-style cast-iron manifold and gasket kit that restores sealing and performance for compatible Toyota 4-cylinder engines but may need minor finishing during installation.
4. Toyota Manifold-to-Head Exhaust Gasket (17173-28010)
| Manufacturer Part Number | 17173-28010 |
|---|---|
| Brand | Toyota |
| Model | Manifold Gasket |
This Toyota manifold gasket is a straightforward replacement part designed to seal the exhaust manifold to the cylinder head. It is typically used during manifold or catalytic converter work to stop exhaust leaks and restore proper exhaust flow. The listing identifies the part as a factory-style manifold gasket and customer reports show it can stop leaks when fitted correctly. Because it is a single-piece gasket with machined exterior details, installation is simple for a technician or experienced DIYer replacing the manifold or catalytic converter flange. Some buyers reported consistent fit and quiet operation after installation, while a minority noted warpage and inconsistent hole sizing on individual units, which could cause leaks if used. If you choose this budget-oriented option, inspect the gasket for flatness and correct hole alignment before assembly to avoid installation problems. It is a practical, low-cost way to replace a leaking exhaust manifold gasket when the part matches your Highlander’s service part requirements.
Best for: Budget-conscious Toyota Highlander owners focused on a low-cost, factory-style replacement when repairing an exhaust leak or replacing the catalytic converter.
Less Ideal for: Owners who prefer dealer-sourced parts with guaranteed fitment verification or those unwilling to inspect parts before installation should consider alternatives.
- Factory-brand replacement intended to match Toyota fitment and specifications.
- Simple one-piece design that is quick to install during manifold or catalytic converter service.
- Low-cost option that can reliably stop exhaust leaks when the part is flat and holes align correctly.
- Some units have been reported warped or with inconsistent hole shapes which can cause leaks.
- No additional sealing materials or hardware included, so preparation and proper torqueing are required.
Verdict A cost-effective, factory-branded gasket that can stop manifold leaks for Toyota Highlander repairs if inspected for flatness and correct hole alignment before installation.
5. A-Premium Exhaust Manifold Catalytic Converter Kit for Toyota Highlander 2.4L (2001–2003)
| Vehicle Fitment | Toyota Highlander 2001-2003 L4 2.4L |
|---|---|
| EPA Compliant | Yes |
| Body Material | Stainless Steel |
| Includes | Manifold, gaskets, bolts, mounting hardware |
| Manufacturer Part Number | APCCT168 |
This A-Premium kit replaces the factory manifold and catalytic converter on Toyota Highlander 2001–2003 2.4L engines and arrives with gaskets, bolts, and brackets for a single-package swap. It is built from stainless steel and marked as EPA-compliant for federal emissions, so it is intended to restore exhaust routing and emissions control after a failed factory unit. Typical installation replaces the manifold and downstream converter in one job and the included hardware reduces the need to reuse old parts. Buyers note mostly good fitment but a few reports describe minor alignment issues with tabs or bracket placements, so careful test-fitting and minor adjustments may be required during installation. The kit includes inlet and outlet mounting provisions and is backed by a one-year unlimited-mileage guarantee. It is not legal for sale or use in certain states with stricter emissions rules, so confirm local regulations before buying. This is a practical, budget-oriented replacement for Highlander owners needing a functional, factory-style manifold and converter assembly.
Best for: A risk-averse mainstream buyer who wants a complete, factory-style replacement that minimizes parts sourcing and restores emissions control on a 2001–2003 Highlander without hunting for separate components.
Less Ideal for: Drivers in states with restricted aftermarket converter regulations or anyone requiring a guaranteed perfect OEM fitment without any on-vehicle adjustments should consider other options.
- Direct-fit design with manifold, catalytic converter, gaskets, bolts and mounting hardware included
- Stainless steel construction resists corrosion compared with mild steel replacements
- EPA-compliant for federal emissions systems where allowed
- One-year unlimited-mileage guarantee from the manufacturer
- Not legal for sale or use in several states with strict emissions regulations
- Some buyers reported minor alignment and bracket fitment issues requiring adjustment
Verdict A complete, factory-style manifold and catalytic converter kit that simplifies replacement for 2001–2003 Highlander owners but is restricted in some states and may need minor fitment tweaks.
6. A-Premium Cast Iron Exhaust Manifold Kit with Gasket, Bolts and Heat Shield
| Material | Cast Iron |
|---|---|
| Fitment Type | Direct Replacement |
| Engine design | 1ZZ-FE 1.8L |
| Package contents | Manifold, gasket, flange, bolts, springs, washers, heat shield |
This A-Premium kit is a direct-replacement style exhaust manifold assembly that includes the manifold, gasket, flange hardware, springs, washers and a heat shield. It is intended for bolt-on replacement of a worn or cracked manifold and is made from cast iron, so it feels heavy and durable and should handle high under-hood temperatures. The included gasket and hardware let you complete most basic manifold swaps without hunting for extra parts, though several owners report the heat shield bracket and some studs may need minor modification or re-drilling to sit perfectly. Some buyers also noted uneven welding and a strong new-part odor after installation. For a practical optimizer looking to fix exhaust leaks or replace a failed manifold on a compatible 1.8L 1ZZ-FE engine, this kit delivers a full parts set and solid thermal resistance at a value price, but expect to spend a little time adapting the bracket fitment or swapping bolts if you need factory-exact alignment or higher-grade fasteners.
Best for: Practical optimizers who want a complete, lower-cost replacement manifold kit to repair exhaust leaks and restore drivability without paying OEM prices. They prioritize getting the job done with basic shop skills and are willing to make minor fitment adjustments during installation.
Less Ideal for: Buyers who expect perfect factory alignment out of the box or who prefer to avoid any installation tweaks should consider factory-quality replacements or professional-supplied parts instead.
- Complete kit includes manifold, gasket, bolts, springs, washers and heat shield to avoid sourcing extra parts
- Cast iron construction offers strong heat resistance and a sturdy feel compared with lighter aftermarket pieces
- Fits the 1ZZ-FE 1.8L engine family so it addresses common leak and cracking issues with older Corolla/Matrix/Vibe manifolds
- Some units show misaligned support bracket or heat shield holes that require drilling or modification
- Provided hardware quality is inconsistent and some installers prefer stronger grade bolts
- Occasional welding defects reported and initial odor after first weeks of use
Verdict A budget-friendly, all-in-one cast-iron manifold kit that reliably repairs 1.8L 1ZZ-FE exhaust issues if you accept occasional bracket fitment tweaks.
7. PHILTOP Catalytic Converter Kit for Toyota 4.0L (Tacoma/4Runner/FJ Cruiser/Tundra)
| Brand | PHILTOP |
|---|---|
| Compatible engines | Toyota 4.0L |
| EPA compliance | EPA compliant (not for CA/CO) |
This PHILTOP catalytic converter kit replaces the factory catalytic section on compatible Toyota 4.0L engines and is sold as a two-piece assembly with gaskets and mounting hardware. It is typically used to restore emissions performance and clear cat or O2 sensor codes after a failed converter. The body uses aluminized stainless tubing and a high-temperature ceramic carrier to increase flow area while maintaining oxygen storage for emissions control. Buyers will appreciate that the kit is EPA compliant for most states, includes the necessary hardware for a bolt-in replacement, and aims to match common Toyota part numbers for straightforward fitment. Real-world benefits reported by users include quieter operation, resolved check-engine codes, and improved drivability after installation. Notable limitations are inconsistent fit on some vehicles where flange bends or heat-shield mounts did not line up, and the two-piece design and brief instructions can make a DIY install challenging for owners without a lift or fabrication experience.
Best for: Balanced buyers who want a factory-replacement style catalytic converter to restore emissions and drivability on Toyota 4.0L vehicles without prioritizing premium OEM pricing.
Less Ideal for: Owners seeking a guaranteed perfect fit or a plug-and-play DIY install without a lift or mechanic may prefer a dealer or professional-installed factory replacement.
- Designed for Toyota 4.0L applications so it targets common factory replacement needs
- Includes gaskets and mounting hardware for a more complete install kit
- Stainless/aluminized tubing and high-temperature ceramic carrier aimed at durability and emissions performance
- EPA compliant for sale outside restricted states
- Two-piece assembly and minimal instructions can complicate DIY installation
- Some users reported flange bends or heat shield bolt locations that do not match perfectly
Verdict A cost-conscious, factory-style replacement for Toyota 4.0L applications that fixes emissions issues for most owners but may require professional fitment for perfect alignment.
Choosing the Right Toyota Highlander Exhaust Manifold: Key Factors to Consider
Fitment And Flange Alignment
Proper fitment is essential because misaligned flanges or ports cause exhaust leaks and make installation difficult. Ensure the manifold matches the cylinder head’s bolt pattern and port shape so gaskets seat evenly and bolts torque without stress.
A manifold that fits precisely reduces the chance of warping during heat cycles and minimizes exhaust backpressure. Confirming alignment up front saves time during installation and prevents gasket failures that lead to noise and emissions issues.
Material And Heat Resistance
The material determines how well the manifold handles extreme temperatures and repeated heating and cooling. Cast iron offers good durability and resistance to thermal fatigue, while certain stainless steel alloys can provide lighter weight and better corrosion resistance.
Consider how resistive the material is to cracking and warping over time. Higher-grade materials and thicker sections typically last longer in stop-and-go driving and towing conditions where heat spikes are common.
Gasket Surface And Sealing Design
A flat, machined sealing surface and compatible gasket type are crucial to prevent exhaust leaks. Uneven surfaces or poor gasket interfaces allow hot exhaust gases to escape, causing ticking noises, reduced scavenging, and possible engine management issues.
Look for manifolds designed to work with reliable gasket styles and that include clear specifications for torque sequencing. Proper sealing reduces noise and protects downstream components from hot gas exposure.
Structural Strength And Crack Resistance
Manifolds are prone to cracking where stress concentrates, such as bends, welds, or near bolt holes. Design features that reinforce these areas or use continuous castings rather than thin-walled welded assemblies tend to resist cracking longer.
Think about your driving conditions: frequent short trips, heavy loads, or rough roads increase stress cycles. A sturdier design reduces the likelihood of cracks that cause leaks and costly repairs later.
Thermal Management And Heat Shielding
How a manifold manages and contains heat affects nearby components and cabin comfort. Integrated or compatible heat shields, as well as thermal coatings, can lower under-hood temperatures and protect wiring and plastic parts.
Effective thermal management also preserves nearby gaskets and sensors from premature degradation. Consider whether additional heat shielding or ceramic coatings are appropriate for your driving style and climate.
Installation Accessibility And Serviceability
Easy access to mounting bolts and compatibility with existing sensors and hardware makes installations faster and less prone to mistakes. Manifolds that require minimal disassembly of surrounding parts reduce labor and the risk of introducing new issues during service.
Also consider whether replacement gaskets and mounting hardware are readily available. Good documentation and common fastener types simplify future maintenance and potential repairs.
FAQ
What are common symptoms of a failing exhaust manifold?
Common symptoms include a ticking or popping noise on cold start that changes with engine speed, a noticeable drop in engine performance or fuel economy, and a distinct exhaust smell in the engine bay. You may also see soot or black streaks around the flange area or notice rough idling. These signs often indicate sealing issues, cracks, or a loose flange.
How do I diagnose an exhaust manifold leak on a Toyota Highlander?
You can often detect a leak by listening for high-pitched ticking near the engine during cold start and as revs change. Inspect visually for soot, black streaks, or warped flanges near the head. A smoke test or using a piece of hose as a listening probe while someone revs the engine can help pinpoint the leak without major disassembly.
Should I choose cast iron or stainless steel for the manifold?
Cast iron is typically more resistant to thermal fatigue and is durable in everyday driving, while stainless steel can offer better corrosion resistance and lighter weight. The right choice depends on driving conditions, desired longevity, and whether weight or corrosion exposure are major concerns. Both materials have tradeoffs in cost and repairability.
Can a damaged manifold gasket cause the same problems as a cracked manifold?
Yes, a failing gasket can produce exhaust leaks, ticking noises, and reduced engine efficiency similar to a cracked manifold. Gasket failures are often easier to repair but can recur if the sealing surfaces are warped or the flange alignment is poor. Inspect both the gasket and flanges when diagnosing.
How difficult is exhaust manifold installation on a Highlander?
Installation difficulty varies by engine and surrounding components, but many exhaust manifolds are accessible with common hand tools in a home garage. Some jobs require removal of heat shields, accessories, or intake components to gain clearance. If access is limited or fasteners are seized, the task can become more time consuming.
Will installing a new manifold affect emissions or engine sensors?
A properly fitted manifold that preserves sensor ports and exhaust routing should not negatively affect emissions controls. Ensure any sensor bung locations are maintained and that sealing is correct to avoid false readings. If emissions equipment or sensor positions are altered, further adjustments or inspections may be necessary.
How We Chose the Best Toyota Highlander Exhaust Manifold
We focused on items that specifically fit the Toyota Highlander and meet common longevity and performance expectations. Key evaluation criteria included flange and port alignment to ensure proper fitment, thermal resistance and material grade to handle repeated heat cycles, gasket compatibility and sealing surface quality to limit leaks, and structural design to resist warping or cracking under stress. We also assessed ease of installation in typical garage settings and overall emission compatibility where applicable. Exclusions: we did not consider options lacking clear fitment data for the Highlander, manifolds with unverified material claims, or units intended for racing-only applications that sacrifice longevity for peak output. The result is a list of practical, road-ready options that prioritize reliable sealing, consistent flow, and durable construction.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Toyota Highlander exhaust manifold, prioritize proper fitment and a material that withstands repeated heat cycles. Pay close attention to sealing surface quality, gasket compatibility, and structural design to avoid leaks and cracks over time. Weigh tradeoffs between long-term durability, corrosion resistance, and installation complexity. Selecting a well-matched manifold and ensuring correct installation will provide the most reliable outcome for performance, noise reduction, and longevity.
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