Genuine GM Gen V LT Exhaust Manifold Header Gasket Pair w/Bolts | GM 12657093 | Fits 2014+ Gen V LT Engine LT1 LT4 L82 L83 L84 L86 L87 L8T | OEM Gaskets w/Hardware

The GM 12657093 Exhaust Manifold/Header Gasket Pair with Bolts is the complete OEM solution for sealing and securing your Gen V LT engine’s exhaust system. Featuring two multi-layer steel (MLS) gaskets and a full set of new OEM-style bolts, this kit ensures a reliable, leak-free seal while simplifying manifold or header installation. Built to handle extreme heat and pressure, the MLS gaskets prevent blowouts and exhaust leaks, while the factory bolts provide the clamping force required for long-lasting durability. Designed for 2014+ Gen V LT engines including LT1, LT4, L82, L83, L84, L86, L87, and L8T, this kit is ideal for stock replacements, performance header installs, and boosted builds.

• Complete OEM Gasket & Bolt Kit – Includes two GM 12657093 multi-layer steel exhaust gaskets plus a full set of Grade 10.9 flanged bolts for a one-box solution.
• Durable Multi-Layer Steel Gaskets – MLS design delivers superior sealing against extreme heat, pressure, and vibration for long-term reliability.
• New Hardware Included – Durable bolts provide proper torque retention and ensure the exhaust system stays leak-free under demanding conditions.
• Perfect for Stock or Aftermarket Headers – Designed for factory manifolds or performance header upgrades, handling high-RPM and boosted applications.
• Wide Gen V LT Engine Coverage – Fits LT1, LT4, L82, L83, L84, L86, L87, and L8T engines used in GM cars, trucks, and SUVs from 2014–present.