After researching specifications, industry standards, and aggregated owner feedback across multiple platforms, we evaluated the most popular LS valve cover gaskets on the market. Our comparison focuses on material composition, sealing performance, heat resistance, and ease of installation for both stock and modified LS engines. Below are our findings to help you choose the best gasket for your specific needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Fel-Pro VS 50326 R Valve Cover Gasket Set Best Overall Rubber-coated steel core, includes grommets and bolt seals |
9.2 | 🛒 Check Price |
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Mahle Original VS50326 Valve Cover Gasket Set Runner Up Nitrile rubber with steel core, includes tube seals and grommets |
8.8 | 🛒 Check Price |
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GM Genuine Parts 12617944 Valve Cover Gasket OEM Replacement OEM rubber, includes grommets and tube seals |
8.5 | 🛒 Check Price |
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Victor Reinz 71-10006-00 Valve Cover Gasket Set Best Value Nitrile rubber, includes grommets and tube seals |
8.2 | 🛒 Check Price |
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HPS Silicone LS Valve Cover Gaskets Best for High Heat Silicone rubber, reusable design |
7.9 | 🛒 Check Price |
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ATP Automotive 102-107 Valve Cover Gasket Set Budget Pick Cork-rubber blend, includes grommets |
7.5 | 🛒 Check Price |
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Dorman 635-102 Valve Cover Gasket Set Alternative Fit Rubber, includes grommets but no tube seals |
7.2 | 🛒 Check Price |
1. Fel-Pro VS 50326 R Valve Cover Gasket Set: Best Overall
In our evaluation, the Fel-Pro VS 50326 R consistently ranks as the top choice for LS valve cover gaskets. Based on owner feedback and the spec sheet, its PermaDryPlus technology uses a rubber-coated steel core that resists crushing and maintains a consistent seal over time. The kit includes everything needed: valve cover gaskets, spark plug tube seals, and bolt grommets. We found that installation is straightforward, and the gaskets do not require additional sealant when installed on clean, flat surfaces.
However, these gaskets are not ideal for heavily modified engines with extreme valve cover warpage. Some owners reported that if the valve cover is bent or the mounting surface is not perfectly flat, the gasket may not seal perfectly. Those with severely modified or aftermarket valve covers should consider a more forgiving material like silicone or a thicker gasket. For most stock to mildly modified LS engines, this is the best all-around choice.
- PermaDryPlus molded rubber technology provides a tight seal
- Includes integrated spark plug tube seals and valve cover grommets
- Compatible with LS1, LS2, LS3, LS6, and LQ4/LQ9 engines
Pros: Excellent heat and oil resistance; Easy to install with no RTV required; Comprehensive kit includes all necessary seals
Cons: Slightly higher price point than basic cork or rubber gaskets
2. Mahle Original VS50326 Valve Cover Gasket Set: Runner Up
The Mahle Original VS50326 set is a strong competitor, offering OEM-level quality at a more accessible price point. Based on our research, the nitrile rubber material provides good resistance to oil and heat, and the steel core adds stability. Owner feedback indicates that these gaskets seal well on stock valve covers and are a popular choice for budget-conscious builders. The kit includes spark plug tube seals and grommets, making it a complete solution.
One limitation noted in our evaluation is that the spark plug tube seals can be slightly tight, requiring careful alignment to avoid tearing during installation. Some owners with aftermarket valve covers have reported that the gasket may not conform as well as silicone alternatives. We recommend these for stock or lightly modified LS engines where budget is a priority but reliability is still key.
- OEM-quality nitrile rubber compound resists oil and heat
- Steel core prevents gasket distortion during installation
- Includes spark plug tube seals and valve cover grommets
Pros: Good value for the price; Reliable sealing performance; Direct fit for most LS engines
Cons: Tube seals may be slightly smaller than OEM, requiring care during installation
3. GM Genuine Parts 12617944 Valve Cover Gasket: OEM Replacement
The GM Genuine Parts 12617944 is the exact gasket used on LS engines from the factory. In our evaluation, this gasket offers the best fitment for stock valve covers, with material that matches the original in hardness and sealing characteristics. Owner feedback highlights its reliability over many miles, and installation is straightforward. It comes with all required seals, making it a true direct replacement.
However, the premium price may not be justified for those with aftermarket valve covers or engines that see heavy track use. Additionally, the gasket is not as forgiving of surface imperfections as some silicone options. We recommend this for owners who want a guaranteed OEM fit and are willing to pay extra for the peace of mind of a genuine part.
- Factory GM part for exact fit and performance
- High-quality rubber compound meets OEM specifications
- Includes all necessary seals for a complete install
Pros: Perfect fit for stock LS engines; Proven long-term durability; No need for additional sealant
Cons: Higher price than aftermarket equivalents; Not designed for aftermarket valve covers or extreme modifications
4. Victor Reinz 71-10006-00 Valve Cover Gasket Set: Best Value
The Victor Reinz 71-10006-00 is a budget-friendly option that still offers reliable sealing for most LS engines. Based on owner feedback, it fits well on stock valve covers and the nitrile rubber provides adequate resistance to oil and heat. The kit includes all necessary seals, making it a complete solution at a lower cost than many competitors. For those on a tight budget, this is a solid choice.
However, our research indicates that some users have experienced gasket shrinkage after prolonged exposure to heat, which can lead to leaks. This gasket is best suited for daily-driven, stock LS engines that do not see extreme temperatures. If you plan to track your car or have a high-performance build, we recommend investing in a more durable gasket.
- Affordable alternative to OEM without sacrificing quality
- Nitrile rubber resists oil and heat well
- Includes spark plug tube seals and valve cover grommets
Pros: Very competitive price point; Good sealing for stock applications; Complete kit
Cons: Some owners report the gasket may shrink over time; Not as durable as premium rubber or silicone options
5. HPS Silicone LS Valve Cover Gaskets: Best for High Heat
HPS Silicone gaskets are designed for high-heat applications, such as forced induction or high-compression LS engines. The silicone material can handle temperatures that would degrade standard rubber, making them a favorite among performance enthusiasts. In our evaluation, the thicker profile helps seal valve covers that are slightly warped, which is common on older or heavily modified engines. Owner feedback often praises their longevity in harsh conditions.
That said, the silicone material is very soft and flexible, which can make installation tricky. Without careful alignment, the gasket can shift or bulge, leading to leaks. Many owners recommend using a thin layer of RTV in the corners for added security. These are not ideal for casual DIYers or those with perfectly flat stock covers; they are best reserved for high-performance builds where heat is a concern.
- High-temperature silicone withstands extreme heat
- Reusable and resistant to compression set
- Thicker material helps seal warped valve covers
Pros: Excellent heat resistance for turbo or supercharged builds; Can be reused if removed carefully; Thick profile accommodates minor surface irregularities
Cons: More difficult to install due to flexibility; May require RTV sealant in corners for leak-free seal
6. ATP Automotive 102-107 Valve Cover Gasket Set: Budget Pick
The ATP 102-107 is a budget-oriented gasket set made from a cork-rubber blend. In our research, this is one of the least expensive options available, making it attractive for those on a tight budget or needing a temporary fix. It includes grommets and can be installed with minimal effort. Some owner feedback indicates it can seal adequately for daily driving in mild conditions.
However, the cork material is not as durable as rubber or silicone. It can dry out and crack over time, especially under high heat. Over-tightening the bolts can crush the gasket and cause leaks. We do not recommend this for performance engines, turbo builds, or long-term use. It is best suited for low-budget repairs or as a stopgap until a better gasket can be installed.
- Low-cost cork-rubber material
- Includes valve cover grommets
- Suitable for temporary or low-mileage use
Pros: Very affordable; Easy to find at local auto parts stores; Works for quick fixes
Cons: Cork material degrades faster than rubber or silicone; Prone to leaking if over-tightened or exposed to high heat
7. Dorman 635-102 Valve Cover Gasket Set: Alternative Fit
The Dorman 635-102 is a basic rubber gasket set that covers the valve cover seal and includes grommets, but notably lacks spark plug tube seals. Based on owner feedback, fitment can be hit or miss, with some users reporting gaps or difficulty achieving a proper seal. It is one of the most affordable options, but the lack of tube seals means you will need to purchase them separately if your engine requires them.
This gasket is best suited for older LS engines with separate tube seals that are still in good condition, or for temporary use. We do not recommend it for high-performance or daily-driven vehicles where reliability is critical. Most owners in our evaluation preferred to spend a little more for a complete set with tube seals included.
- Economical rubber gasket set
- Includes valve cover grommets
- Fits many LS engines
Pros: Low cost; Simple design
Cons: Does not include spark plug tube seals; Inconsistent fitment reported by some owners
Frequently Asked Questions
What is the best material for LS valve cover gaskets?
The best material depends on your application. For stock engines, rubber-coated steel or nitrile rubber gaskets offer a good balance of durability and ease of installation. Silicone gaskets are better for high-heat applications but can be harder to install. Cork-rubber blends are budget-friendly but less durable. We recommend rubber or silicone for most builds.
Do I need to use RTV sealant with LS valve cover gaskets?
Most modern rubber or silicone gaskets are designed to seal without RTV on clean, flat surfaces. However, some owners apply a thin layer of RTV in the corners where the valve cover meets the cylinder head to prevent oil seepage. Always follow the manufacturer’s instructions; some gaskets explicitly require no additional sealant.
How often should LS valve cover gaskets be replaced?
There is no set interval; replacement is typically driven by leaks or during engine maintenance. Many owners find that quality gaskets last 50,000 to 100,000 miles under normal driving conditions. High heat or frequent engine modifications can shorten their lifespan. Inspect your gaskets for cracks, hardening, or oil seepage and replace as needed.
Can I reuse LS valve cover gaskets?
Reusability depends on the material. Silicone gaskets can often be reused if they are not damaged, but rubber and cork gaskets usually compress permanently and should be replaced. For best results, always install new gaskets when removing valve covers.
Are aftermarket LS valve cover gaskets as good as OEM?
Many aftermarket gaskets from brands like Fel-Pro, Mahle, and Victor Reinz meet or exceed OEM specifications. However, aftermarket gaskets may use different materials (e.g., silicone) that offer advantages in certain applications. For a direct stock replacement, OEM GM gaskets are a safe choice, but aftermarket options often provide better value or performance.
Our Verdict
After thorough research and comparison, our top pick is the Fel-Pro VS 50326 R for its excellent sealing performance, complete kit, and ease of installation. For a more budget-friendly option that still delivers reliable sealing, the Mahle Original VS50326 is our runner up. Choose based on your specific engine condition and performance needs.
