The Best Ls9 Head Gasket of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Ls9 Head Gasket of 2025. Check our ranking below.
2,661 Reviews Scanned
- High-Performance MLS Head Gasket Pair – Includes two (2) BTR LS9 multi-layer steel gaskets, built to handle high cylinder pressures in turbo, supercharged, and nitrous LS engines.
- 4.100” Bore Compatibility – Ideal for strokers, forged rotating assemblies, and large bore builds, delivering precise sealing and optimal combustion chamber integrity.
- Built for Boost – Based on the proven GM LS9 design, these gaskets are perfect for forced induction applications where traditional head gaskets may fail under pressure.
- Multi-Layer Steel Construction – Features a durable MLS design with proprietary coatings for exceptional head sealing, heat resistance, and long-term durability.
- Replaces GM 12622033 – Drop-in replacement for factory LS9-style gaskets with enhanced sealing properties for performance and racing engines.
- BTR LS9 Cylinder Head Gaskets MLS PAIR
- BTR Performance Multilayer Head Gasket for LS9 engines, can also be used with LS3, LS2 and 6.0 iron blocks.
- 4.100" bore, .055" compressed thickness, 7 layer
- These are possibly THE best gaskets for engines up to 4.100" bore.
- Very common head gasket to use on Turbo and Supercharged engines.
- Complete Top-End Refresh Kit – Includes (2) LS9 multi-layer steel (MLS) head gaskets and (16) genuine Delphi LS7-style hydraulic roller lifters for a full valvetrain and combustion sealing upgrade.
- MLS Gaskets for Boosted or High-Compression Builds – The LS9 head gaskets feature a 7-layer MLS design with a 4.100” bore, ideal for turbo, supercharged, nitrous, or stroker LS setups.
- OEM Delphi LS7 Lifters – Proven performance lifters used in the factory LS7 Corvette Z06; known for high-RPM stability, quiet operation, and long-term durability.
- Wide LS Engine Compatibility – Fits a broad range of Gen III and Gen IV LS engines including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L platforms like LS1, LS6, LS2, LS3, LQ4, LQ9, LS7, and more.
- Perfect for Cam Swaps, Rebuilds & Performance Upgrades – Ideal for AFM/DOD conversion kits, top-end rebuilds, or full-performance LS engine builds requiring reliable sealing and valvetrain control.
- FITMENT: LS9 cylinder head gasket kit fit for LS1 LS6 LQ4 LQ9 LS9 4.8L 5.3L 5.7L 6.0L 6.2L engine
- PACKAGE INCLUDE: LQ4 head gasket kit includes gen 4 valley cover gasket (6.2L), ls1/ls2/ls3 header gasket, ls oil pan gasket, ls water pump gasket, ls front cover gasket, ls valve cover gasket, ls damper seal, ls rear cover gasket, rear main seal, water crossover/block off gasket, knock sensor grommet and multi-layer steel (mls) gaskets for ls9 engines
- PART NUMBER: 12610141, 12551933, 12558177
- DURABLE: lq9 lq4 gasket kit is durable and less prone to breakage to provide exceptional service life and reliability
- PART NUMBER: 12622033 BTR22033 412622033
- ENGINE NUMBER: for LS9 engine
- APPLICATION: These gaskets can also be used with LS3, LS2, and 6.0L iron blocks, as well as 4.8L/5.3L and LS1/LS6 applications (bore diameter differs, but these gaskets are still compatible for use on the smaller bores)
- NOTE: IT'S 5 LAYER, 5 LAYER PRESS TOGETHER, press like big- small -big-small-big layer, and it's pressed tightly, so 3 big layer easy to easy to check, other 2 layer not easy to find out, PLEASE CHECK THE LAST PICTURE IN THE DESCRIPTION ABOUT THE LAYER
- LONGER SERVICE LIFE: High quality durability material and excellent crafts, as well as the applied series of tests in RD center before they were listed, provide a reliable operation and longer service life of this item.
- High-Performance MLS Head Gasket Pair – Includes two (2) 7-layer multi-layer steel (MLS) LS9-style head gaskets designed for extreme pressure sealing in performance LS builds.
- 4.100” Bore for Oversized Pistons & Stroker Setups – Optimized for stroker kits, forged rotating assemblies, and high-horsepower builds requiring increased combustion chamber sealing.
- Designed for Boosted or High-Compression Engines – Built to handle the demands of turbocharged, supercharged, or nitrous LS engines, maintaining combustion seal under extreme cylinder pressure.
- Compatible with 5.3L, 5.7L, 6.0L, and 6.2L LS Platforms – Fits popular LS engines including LS1, LS6, LQ4, LQ9, L76, L77, L92, L94, L99, and more.
- Replaces GM 12622033 – Direct replacement for LS9-style gaskets used in factory supercharged applications, offering race-ready sealing performance with OEM fitment.
- 【HEAD GASKET KIT】LS Gasket Kit-for Chevrolet Silverado 3500 HD, 2500HD, 1500,for Express 3500 .For GMC Sierra 1500,2500 HD 1999-2010. For GM for Chevy LS LS9 LS1 LS6 LQ4 LQ9 4.8L 5.3L 5.7L . NOTE: for GEN 3 Gasket kit only includes what is listed above and does not include intake manifold gaskets
- 【OE NUMBER】LS Head Gaskets Set-12558178, BTR73450, 12617944, 12612350, 12630223, 12633904, 12637683, 12585673, 12639249, 89060436, 12551933, 12611384, 12558177, 12622033
- Professional installation in highly recommended (No instruction included)
- Please confirm the old part number match our list part number (does judge it by your vehicle model and year)
- 【IMPORTANT NOTE】5.3 LS Gasket Set Kit & LS9 Head Gaskets are designed for the professional installer. It does not come with any installation instructions. If you do not have a service manual, please consult a professional mechanic prior to installing this kit
- 🚘Part Number: 12622033, (Please verify this is the right part number before ordering);
- 🚘Direct replacement for a proper fit;
- 🚘Replacement for LS9 LSA engines and LS2 LS3 and 6.0 iron blocks；
- 🚘Includes all the parts in the pictures；
- 🚘If you have any question or any unsatisfactory about the product, you can contact our customer service at any time, our team will response you in 24 hours；
- Complete Head Gasket Set (Pair) – Includes two (2) high-performance BTR MLS head gaskets, engineered to provide maximum combustion sealing in high-horsepower LS builds.
- Built for 6.0L & 6.2L LS Rectangle Port Engines – Designed to fit LS-based engines including L99, L76, L77, L92, L96, L94, L9H, LS2, LQ4, and LQ9—ideal for Gen III/IV builds.
- Multi-Layer Steel Construction – Manufactured using multiple layers of stainless steel, these gaskets provide high-strength sealing under boost, nitrous, or high compression.
- Trusted by Top LS Builders – Proven in street/strip and track applications, BTR gaskets deliver race-ready durability while maintaining OEM-level fit and reliability.
- Perfect for Rebuilds or Performance Upgrades – Whether refreshing a stock top end or building a 600+ HP boosted setup, these gaskets provide leak-free, long-term performance.
Last update on 2024-02-17 / Affiliate links / Images from Amazon Product Advertising API
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