Michigan Motorsports Gen V LT Exhaust Header Gaskets | MM-12657093 | Fits 2014+ LT1 LT4 L83 L86 L84 L87 L82 L8T | OEM-Style Multi-Layer Steel Replacements for GM 12657093 (Header Gaskets Only)

The Michigan Motorsports GEN V LT Exhaust Manifold/Header Gasket Pair (MM-12657093) is engineered to deliver reliable OEM-style sealing for 2014+ GEN V LT engines, including LT1, LT4, L83, L86, L84, L87, L82, and L8T applications. Manufactured using a durable multi-layer steel (MLS) construction, these gaskets maintain consistent sealing integrity under high-temperature exhaust conditions. Designed as direct replacements for GM 12657093, they offer precise port alignment and a factory-correct fit for both exhaust manifolds and aftermarket headers. Whether refreshing a daily-driven LT engine or servicing a performance platform, this matched gasket pair ensures dependable, leak-free exhaust sealing backed by Michigan Motorsports quality.

• Direct OEM-Style Fitment: Replaces GM 12657093 with precise port alignment and a factory-matched sealing profile for LT1, LT4, L83, L86, L84, L87, L82, and L8T engines to ensure reliable exhaust interface performance.
• Durable MLS Construction: Built using multi-layer stainless steel engineered for high-temperature exhaust operation, resisting warping and maintaining stable clamping force under repeated heat cycling.
• Manifold & Header Compatible: Designed to fit factory exhaust manifolds as well as many aftermarket headers, providing consistent sealing and proper flange engagement without requiring modifications.
• Reliable Leak Prevention: Helps maintain exhaust sealing integrity at the cylinder head flange, reducing the risk of exhaust noise, carbon tracking, or misalignment caused by aging OEM gaskets.
• Ideal for Maintenance & Rebuilds: A dependable solution for gasket replacement during manifold swaps, header installations, or engine servicing on GEN V LT platforms requiring OEM-style sealing performance.