VKVXCLON Exhaust Manifold Header Gasket Kit 12617944 — MLS, 2 Gaskets & 12 Bolts, Direct-Fit for GM

VKVXCLON 12617944 Exhaust Manifold Header Gasket with Bolts is a direct-fit multi-layer steel gasket kit designed to seal exhaust manifolds on numerous GM and compatible vehicles, supplied with the bolts needed for installation.

This header gasket set replaces worn or leaking exhaust manifold seals using a durable multi-layer steel construction that stands up to high heat and vibration. It arrives as a complete kit — two gaskets and twelve bolts — engineered to match OE fitment numbers (including 12617944, 12558573, 12600530, 12620947) for a wide range of Chevrolet, GMC, Cadillac, Hummer, Isuzu and other platforms. The design reduces exhaust leakage and helps restore quiet operation and consistent backpressure without modification to the manifold or cylinder head.

Which vehicles does this gasket kit fit?

The VKVXCLON kit covers a broad roster of GM and related models. It is compatible with many Chevrolet trucks, vans and performance cars, Cadillac and GMC models, plus Hummer, Isuzu and several Pontiac and Saab derivatives.

• Chevrolet: Avalanche, Camaro, Colorado, Corvette, Express series, Impala, Monte Carlo, Silverado, Suburban, Tahoe, Trailblazer
• GMC & Cadillac: Sierra, Savana, Yukon, CTS, Escalade, Canyon, Envoy
• Other: Hummer H2/H3, Isuzu Ascender, Saab 9-7x, Pontiac Firebird/G8, Grand Prix, GTO

How does the multi-layer steel design perform under heat and vibration?

Multi-layer steel (MLS) gaskets provide a resilient seal by combining thin steel layers that flex with temperature cycles while resisting combustion gases. MLS resists permanent deformation better than many composite gaskets, making it suitable for modern engines with repeated thermal expansion.

• High-temperature steel layers for sustained heat resistance
• Engineered to maintain compression across manifold mounting surface
• Reduced risk of leaks and less exhaust noise compared to aged gaskets

What comes in the box and what tools are required?

The package contains two precision-cut exhaust manifold/header gaskets and twelve bolts sized for the corresponding manifold flanges. Typical installation requires basic hand tools and routine torque procedures; no manifold machining or custom fitting is intended.

• Included: 2 exhaust manifold/header gaskets and 12 mounting bolts
• Recommended tools: ratchet, torque wrench, socket set, penetrating oil for old studs
• Installation note: align gasket to manifold and tighten bolts to manufacturer torque specs

Will installing this gasket reduce noise or improve performance?

Replacing a failed exhaust manifold gasket can noticeably reduce exhaust leaks that create ticking or popping sounds and can restore proper exhaust backpressure. While not a performance upgrade, a correct seal helps the engine run as intended and can prevent downstream issues from exhaust leakage.

• Reduces audible exhaust leaks and ticking noises
• Helps maintain proper exhaust backpressure and sensor readings
• Prevents hot gas escape that can damage surrounding components

Who is this for: The VKVXCLON 12617944 Exhaust Manifold Header Gasket with Bolts is for DIY mechanics, fleet managers, and professional technicians replacing worn or leaking manifold seals on applicable GM and related vehicles. Choose this kit if you need a direct-fit, heat-resistant gasket set supplied with all bolts for a straightforward replacement that follows OEM fit numbers.