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If you own an Infiniti FX35 and are facing oil or coolant leaks, choosing the correct engine gasket set can stop seepage and protect engine performance. The right gasket set affects compression, fluid containment, and long-term reliability, so it is important to match the kit to the engine’s configuration and common failure points. This guide shortlists the top options for the Infiniti FX35, focusing on fitment, material quality, and the range of included gaskets and seals. Below we explain the selection criteria and what to expect from each shortlisted option before you inspect fitment and prepare for installation.
Looking for other parts? See all Infiniti FX35 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Fel-Pro VS50900R Valve Cover Gasket Set for INFINITI |  |
| Best Quality Built to a higher standard if you want something more solid | Fel-Pro 1635 Valve Cover Gasket Set |  |
| Best Budget The cheapest option that still gets the job done reliably | ApplianPar Intake Manifold Gasket Set for Infiniti FX35/M35/G35 and Nissan 350Z |  |
| Most Sold A high-volume bestseller chosen again and again | Sorello Valve Cover Gasket Set for Infiniti FX35 3.6L V6 |  |
| Best Value for Money The sweet spot between price and what you get | MILIPARTS Aluminum Valve Cover Kit with Gaskets for 2003–2008 Infiniti FX35 / Nissan 350Z (3.5L) |  |
| Best Overall The best all-around choice for most situations | MITZONE Valve Cover Set with Gaskets, Bolts, Oil Cap, PCV and Spark Plug Tube Seals for VQ35DE 3.5L |  |
1. Fel-Pro VS50900R Valve Cover Gasket Set for INFINITI
| Material | Rubber |
|---|---|
| Model | VS50900R |
| Manufacturer | Fel-Pro |
This Fel-Pro valve cover gasket set supplies the sealing components needed to replace leaking valve cover gaskets on an INFINITI FX35. Sold as a complete repair kit, it uses a cork-rubber formulation that is flexible enough to conform to imperfect sealing surfaces and is intended for the repair environment rather than a cosmetic upgrade. Typical use is engine top-end service: remove the valve cover, clean mating faces, and fit the included gaskets and seals to stop oil seeping into spark plug wells or down the engine. Real-world benefits include a full parts set so you do not have to source small seals separately and a conformable material that helps when the mating surfaces are slightly warped or pitted. Limitations are that the gasket may need a drop of RTV or careful positioning during install to hold it in the groove, and it is a replacement-style part rather than an upgraded performance gasket for high-boost or track use.
Best for: Buyers seeking a reliable, factory-replacement valve cover gasket set for upkeep and routine repairs on an INFINITI FX35 who value completeness and proven sealing performance.
Less Ideal for: Drivers building high-power or track-oriented FX35 engines or those wanting an upgraded aftermarket performance gasket should consider alternatives.
- Complete kit includes all gaskets and seals needed for valve cover service on the FX35
- Cork-rubber compound conforms to imperfect sealing surfaces for a tighter seal
- Manufactured and tested for on-vehicle fit and durability
- Gasket can be thin for handling and may require RTV or careful placement during installation
- Not a specialized high-performance gasket for extreme or modified engines
Verdict A complete, vehicle-specific replacement gasket set that provides dependable sealing for routine FX35 repairs but is not aimed at high-performance builds.
2. Fel-Pro 1635 Valve Cover Gasket Set
| Compatibility note | Fits GMP Performance V8 big block applications (396, 402, 427, 454, 502) |
|---|---|
| Material | Molded silicone rubber with steel core and stainless limiters |
| Model | 1635 |
| Packaging color | Blue |
The Fel-Pro 1635 valve cover gasket set is built for performance use on big block Chevy V8 engines and is intended to provide a reliable, reusable seal during repeated cover removal. It uses a molded silicone rubber perimeter with a solid steel core and stainless compression limiters to keep the gasket form-stable when you remove and reinstall valve covers for routine valve-lash checks or adjustments. In practice the rigid core makes installation easier and prevents the gasket from collapsing or shifting, and reviewers report many cycles of reuse without oil leaks. These gaskets are not adhesive so they sit in the valve-cover rail and rely on proper torque to seal, which suits fabricated or aftermarket aluminum covers especially well. The set is not designed for emission-controlled vehicles and may require trimming or fit checking on some big block applications, so confirm fitment before installing. If you need a durable, service-friendly gasket that holds shape under repeated use, this set delivers; if you require emission-legal or vehicle-specific stamped-steel cover fitment, consider other options.
Best for: Performance-oriented owners who routinely service valve lash or run fabricated/aluminum valve covers and prioritize durability and reusability over price.
Less Ideal for: Buyers who need a vehicle-specific gasket for emission-controlled engines or who prefer a permanently bonded gasket solution should look elsewhere.
- Rigid steel core keeps gasket shape for repeated removal and reinstallation
- Molded silicone rubber construction resists aging and provides reliable sealing
- Stainless steel compression limiters add durability under high clamping forces
- Reported to seal well with fabricated or aftermarket aluminum valve covers, reducing leaks and rework
- Not intended for use in emission controlled vehicles
- May require trimming or fit checking on some big block valve covers
- Does not adhere to the cover rail so correct torque and placement are required for a reliable seal
Verdict A durable, service-friendly valve cover gasket set that holds its shape for repeated removals, best for performance big-block builds rather than emission-controlled stock applications.
3. ApplianPar Intake Manifold Gasket Set for Infiniti FX35/M35/G35 and Nissan 350Z
| Compatible models | Infiniti FX35 2003-2008; M35 2006-2008; G35 2003-2007; Nissan 350Z 2003-2006 |
|---|---|
| Package contents | 1x Intake Manifold Gasket Set |
| Brand | ApplianPar |
| Manufacturer part number | MS96454 |
This ApplianPar kit supplies a complete intake manifold gasket set intended to replace the factory gaskets on compatible Infiniti FX35, M35, G35 and Nissan 350Z engines. It arrives as a single kit so you get all the pieces needed for a typical intake manifold service, which speeds installation and avoids waiting for individual parts. For routine repairs it provides a low-cost alternative to factory or premium aftermarket sets and is useful for DIYers or shops doing a budget rebuild. Some customers report a perfect fit and straightforward installation, while others experienced a leak that required swapping to a higher-quality gasket, so consistency may vary part-to-part. The kit’s main benefit is value and convenience, but buyers should be prepared to verify sealing and consider professional installation or additional sealant if the engine has warped surfaces or heavy wear.
Best for: Budget-conscious owners who prioritize low parts cost and want a ready-to-install intake gasket set for routine maintenance or a value repair on the specified Infiniti models.
Less Ideal for: Owners seeking a guaranteed high-end or performance-grade replacement or those repairing engines with known surface damage should consider premium aftermarket or factory-quality gaskets instead.
- Complete kit includes all intake manifold gaskets so you can replace the full set in one job
- Low-cost option compared with factory or premium aftermarket sets for budget repairs
- Reported to fit the listed Infiniti and Nissan model years without extensive modification
- Quality and sealing consistency appear variable based on some user reports
- May not perform as well on engines with warped mating surfaces or heavy wear
Verdict A complete, low-cost intake manifold gasket kit that is a practical choice for budget repairs but may show variable sealing performance compared with premium replacements.
4. Sorello Valve Cover Gasket Set for Infiniti FX35 3.6L V6
| Vehicle compatibility | Infiniti FX35 3.6L V6 (refer to fitment) |
|---|
This Sorello valve cover gasket set is a direct-replacement kit designed for the 3.6L V6 used in Infiniti FX35 models. It includes valve cover gaskets and related intake gasket pieces intended to restore a factory-style seal where aged gaskets cause oil seepage or increased engine noise. The gaskets use a rubberized compound that the manufacturer says resists heat and maintains compression under engine conditions, which makes installation straightforward for a professional or a competent DIYer following service procedures. In practice the set is useful when replacing leaking valve cover seals during routine maintenance because it helps prevent oil from tracking onto ignition components and can marginally reduce valve-train noise. Important limitations are that this is an aftermarket part from a third-party brand and long-term durability will depend on installation and engine condition, and the package may not include every small hardware piece found on every factory rebuild kit. Buyers should verify fitment to FX35 engine variants before starting the job.
Best for: Risk-averse mainstream buyers seeking a practical, replacement-grade gasket to stop leaks and restore normal operation on their Infiniti FX35 without experimental or performance upgrades.
Less Ideal for: Drivers wanting an upgraded performance gasket or a comprehensive overhaul kit that includes all possible hardware and specialty components should consider more complete or OEM-sourced rebuild packages.
- Designed to match original specifications for straightforward installation on compatible engines.
- Rubberized compound intended to resist heat and maintain an effective seal under operating conditions.
- Includes both valve cover gasket and intake manifold gasket pieces for a more complete sealing job.
- Can reduce oil leakage and some engine noise when installed correctly, helping keep ignition components cleaner.
- Aftermarket brand so long-term durability may vary compared with factory-quality parts.
- May not include every small fastener or sealing washer that some repair scenarios require.
Verdict A practical, direct-replacement gasket set for the FX35 that focuses on restoring sealing and reducing leaks for routine maintenance.
5. MILIPARTS Aluminum Valve Cover Kit with Gaskets for 2003–2008 Infiniti FX35 / Nissan 350Z (3.5L)
| Fitment | 2003–2008 Infiniti FX35 V6 3.5L (VQ35DE) |
|---|---|
| Material | Aluminum |
| Includes | Valve covers, gaskets, bolts, oil filler cap, spark plug tube seals, PCV valve and hose |
| Replaces part numbers | 13264-AM600, 13264-AM610, 132708J102, 132708J112 |
This MILIPARTS valve cover kit replaces the factory plastic covers with cast aluminum units and includes gaskets, tube seals, bolts, an oil filler cap, PCV valve and hose so you get a mostly complete install package. It is intended for 3.5L VQ35DE engines used in the 2003–2008 Infiniti FX35 and similar models and is typically used when the original covers are leaking or as an upgrade for engine appearance and durability. The aluminum construction resists heat and pressure better than plastic and reviewers report good sealing once surfaces are cleaned and small casting imperfections are deburred. The kit’s convenience stands out because spark plug tube seals are replaceable and most necessary hardware is included. Expect to do a bit of prepping during installation: some cast flash may need removal, a few supplied screws or the PCV components might not match factory fit exactly, and some installers prefer OEM gaskets or a different PCV to ensure long-term reliability. For a price-conscious buyer this kit delivers strong value but requires basic mechanical familiarity during fitment.
Best for: Practical optimizers who want a durable, visually upgraded valve cover solution for a 2003–2008 Infiniti FX35 while keeping overall cost and downtime low.
Less Ideal for: Drivers who prioritize a fully factory-identical replacement with no fitment tinkering or those unwilling to do light prep work during installation should consider a factory-quality aftermarket alternative.
- Aluminum construction is more durable and heat resistant than factory plastic covers
- Comprehensive kit includes covers, gaskets, tube seals, bolts, oil cap and PCV hose for a mostly plug-and-play install
- Replaceable spark plug tube seals improve serviceability over integrated designs
- Many reviewers report solid fitment and no leaks after cleaning mating surfaces
- Some casting flash and minor finishing required before installation
- Supplied PCV valve, cross-over tube, or some bolts may not match factory parts exactly
- Some buyers prefer to replace the included gaskets or hardware with OEM parts for long-term reliability
Verdict A budget-friendly aluminum valve cover kit that upgrades durability and appearance for the FX35 but may need minor prep and selective OEM part swaps for perfect long-term fit.
6. MITZONE Valve Cover Set with Gaskets, Bolts, Oil Cap, PCV and Spark Plug Tube Seals for VQ35DE 3.5L
| Compatible Engine | VQ35DE 3.5L |
|---|---|
| Fitment Years | 2003–2008 models listed |
| Package Contents | Driver & passenger covers, gaskets, bolts, oil cap, spark plug tube seals, PCV, hose |
This MITZONE valve cover set is a full replacement package for Nissan/Infiniti VQ35DE 3.5L engines, supplied with both driver and passenger covers plus preinstalled gaskets, spark plug tube seals, PCV valve, bolts and an oil filler cap. It is meant for direct-fit installation on 2003–2008 350Z, G35, FX35 and M35 applications and is typically used to stop oil leaks, refresh a tired engine top end or dress up the engine bay. The preinstalled gaskets and tube seals speed installation and reduce fiddly prep work, and reviewers report good sealing when care is taken during fitment. Expect painted finishes that look good but can be scratched in tight engine bays and a mixed history on bolt quality and occasional fitment or casting issues, so inspect parts before install. For a convenience-driven buyer this kit saves time by bundling needed pieces, but hands-on installers should verify bolt threads and clean casting debris prior to assembly to avoid problems.
Best for: Convenience-oriented owners who want a bundled, ready-to-install valve cover replacement that minimizes parts-sourcing and speeds a repair or refresh.
Less Ideal for: Buyers seeking a pristine show-quality finish or a guaranteed factory-grade part should consider higher-end OEM or professional aftermarket options and separate premium hardware.
- Complete kit includes both valve covers plus gaskets, spark plug tube seals, PCV valve, oil cap and bolts for a single purchase replacement
- Gaskets and tube seals come preinstalled to simplify installation and reduce prep time
- Designed to fit VQ35DE 3.5L engines for direct replacement on specified Nissan and Infiniti models
- Multiple buyers report good sealing performance and elimination of oil leaks when installed correctly
- Some units show inconsistent casting quality, overspray or internal debris requiring cleaning before installation
- Included bolts and hardware have mixed quality reports and some installers prefer to reuse factory bolts
- Painted finish can be thin and is prone to scratching during installation in tight engine bays
Verdict A time-saving, all-in-one valve cover replacement for VQ35DE engines that works well if you inspect hardware and accept variable finish and casting quality.
Choosing the Right Infiniti FX35 Engine Gasket Set: Key Factors to Consider
Fitment and Vehicle-Specific Compatibility
Correct fitment is foundational because even a small mismatch in bolt hole alignment or gasket profile can cause persistent leaks or damage during installation. Always verify that the gasket set is specified for the Infiniti FX35 engine variant year and engine code when applicable.
Kits labeled for generic applications often omit small but critical gaskets or use universal shapes that require trimming. Choosing a vehicle-specific set reduces trial-and-error and avoids additional downtime. Fitment also affects installation torque sequences and mating surface clearances, which in turn influence sealing performance.
Material and Construction Quality
Gasket materials vary by application: head gaskets commonly use multilayer steel or composite layers to maintain combustion seals under high pressure and temperature, while valve cover and oil pan gaskets use flexible elastomers or molded rubber to resist oil exposure. The right material resists heat cycling, oil, coolant, and chemical exposure without losing elasticity or cracking.
Poor materials compress unevenly or degrade quickly, leading to rework. Look for consistent thickness, corrosion-resistant metal layers where needed, and elastomers formulated for hydrocarbon exposure to ensure longevity.
Scope of Included Components
A complete gasket set should include all gaskets and seals commonly disturbed during the service being performed. For an engine overhaul or major repair this often means head gaskets, intake and exhaust gaskets, valve cover gaskets, timing cover gaskets, oil pan gasket, rear main seal, and associated O-rings and seals.
Selecting a kit with comprehensive coverage reduces the chance you must source additional parts mid-job. For routine repairs, smaller specific kits may be acceptable, but verify that any omitted seals are available and match the originals in material and size.
Sealing Surface Preparation and Installation Considerations
Even the best gaskets need proper mating surfaces and installation technique to perform. Surface flatness, cleanliness, and absence of corrosion or old gasket material are critical. Certain high-performance materials require specific torque patterns and controlled tightening to achieve a uniform seal.
Consider whether the kit’s instructions or technical support detail torque specs, sealant use, and recommended mating surface tolerances. Kits that assume improper surface prep can mask material shortcomings and lead to premature failure.
Durability Against Operating Conditions
Engine gaskets must withstand thermal cycles, vibration, chemical exposure, and pressure differentials without losing sealing integrity. Consider the typical operating conditions for your Infiniti FX35, including ambient climate and driving style, and choose materials rated for those stresses.
Durability influences maintenance intervals and repair frequency. Gaskets that resist hardening, cracking, and blowout under elevated temperatures provide better long-term value and reduce the risk of consequential engine damage from leaks.
Ease of Replacement and Support
Some gasket sets include supplementary items such as new bolts, O-rings, and installation guides that simplify the replacement process. Accessibility of technical documentation and support can reduce installation errors and time.
Consider whether you will perform the repair yourself or use a technician and match the kit to your skill level. Kits that clearly identify each component and its location on the engine help avoid mistakes and ensure correct reassembly.
FAQ
How do I know if I need a full engine gasket set or just a specific gasket?
It often depends on the symptoms and the scope of disassembly. If you are addressing a single leak at a valve cover or oil pan, a targeted gasket may be sufficient. However, if you are removing major components such as the heads, intake, or timing cover, replacing all disturbed gaskets at once is usually more reliable to prevent future leaks.
Can I reuse the original bolts and fasteners when replacing gaskets?
Some bolts are designed for one-time torque and stretch, so reusing them may compromise clamping force. Check the vehicle’s service guidance for which fasteners require replacement. When in doubt, replace bolts that are torque-to-yield or show signs of corrosion or damage.
Should I use sealant with new gaskets on the Infiniti FX35?
That depends on the gasket material and the mating surface. Many modern gasket kits are designed to seal without additional sealant, while others specify certain sealants at particular joints or corner areas. Follow the kit instructions and the vehicle service manual to avoid interference with gasket performance.
How long does it typically take to replace major engine gaskets?
Labor time varies widely based on which gaskets are being replaced and the mechanic’s experience. Simple gasket replacements can take a few hours, while head gasket replacement or a full engine gasket overhaul can take a full day or more. Allow extra time for proper surface prep and torque procedures.
What are common signs of a failing engine gasket on the Infiniti FX35?
Common indicators include visible oil or coolant leaks, overheating, white smoke from the exhaust, or unexplained coolant loss without external leaks. Slight seepage at joints or mixed oil and coolant are signs to inspect seals and gaskets promptly to avoid further engine damage.
How We Chose the Best Infiniti FX35 Engine Gasket Set
We prioritized fitment accuracy to the Infiniti FX35 engine first, because proper shape and hole alignment are critical for sealing combustion chambers, oil passages, and coolant passages. Material construction was the next key factor, with durable multilayer steel, composite materials, and high-grade elastomers favored for longevity and resistance to heat and fluids. Inclusion scope mattered as well; we preferred kits that include comprehensive engine seals and gaskets commonly needed during mid- and major-service procedures. Sealing surfaces and thickness consistency were reviewed to ensure proper compression and to reduce the risk of warping or uneven sealing. We also considered user-serviceability and whether the kit covers common leak sources like oil pan, valve cover, timing cover, and intake manifold connections. We excluded incomplete or single-piece gaskets that do not address the broader sealing job typically required for an engine service or overhaul. Kits that lacked critical seals or that used obviously low-grade materials were not considered. The resulting list emphasizes complete, vehicle-specific gasket sets that balance coverage and material quality for reliable repairs.
Our full evaluation process is outlined in our review methodology.
Conclusion
When selecting an Infiniti FX35 engine gasket set, prioritize fitment to the specific engine variant and material quality that matches the engine’s thermal and chemical demands. A kit that covers all seals disturbed during the repair reduces rework and future leaks. Balance the scope of the kit with your planned work: use comprehensive sets for major disassembly and targeted gaskets for minor repairs. Attend to surface preparation, correct torque procedures, and replacement of one-time-use fasteners to get the best long-term sealing performance.
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