Michigan Motorsports LS2 6.0L MLS Head Gaskets - 4.020" Bore - Multi-Layer Steel - Fits LS2 LQ4 LQ9 L76 L77 LY6 L96 LFA LZ1 - Replaces GM 12589227 - Pair

The Michigan Motorsports LS2 6.0L MLS Head Gaskets are engineered to deliver OEM-level sealing performance with the durability required for high-output LS builds. Manufactured using multi-layer stainless steel construction, these gaskets provide a strong, reliable seal between the block and cylinder head, making them ideal for naturally aspirated, high-compression, and boosted setups. The 4.020" bore sizing supports standard bore and small overbore applications, ensuring a clean combustion chamber seal without unnecessary overhang or flow disruption. Whether you're rebuilding a stock 6.0L truck engine or assembling a performance LS2/LQ9 project, these MLS gaskets are designed to handle elevated cylinder pressure, thermal cycling, and long-term durability. They are a direct fit replacement for GM part number 12589227 and are compatible with several 6.0L Gen III/IV LS engines used in Silverado, Sierra, GTO, Trailblazer SS, vans, and swaps.

• High-Performance MLS Head Gaskets for 6.0L LS Engines – Designed for precision sealing and reliability, this pair of Michigan Motorsports head gaskets is ideal for street, performance, or rebuild applications.
• Multi-Layer Steel (MLS) Construction for Strength & Longevity – Features multi-layer stainless steel layers with a high-performance coating, delivering maximum combustion sealing under high-pressure and high-temperature conditions.
• 4.020” Bore Diameter for 6.0L LS Engines – Designed for standard and mild overbore applications, these gaskets are a great fit for factory and performance builds using a 4.020" bore.
• Replaces GM Part Number 12589227 – Direct replacement option for OEM head gaskets used on LS2 and various Gen IV 6.0L engines, offering equal or improved sealing performance
• Compatible with Multiple 6.0L LS-Based Engines – Engineered for LQ4, LQ9, L76, L77, LY6, L96, LFA, and LZ1 engines, ensuring a broad range of truck and performance LS applications.