Metric Exhaust Header & Manifold Bolts

The Metric Exhaust Header & Manifold Bolts by MR. GASKET are essential fasteners for anyone rebuilding or upgrading their vehicle's exhaust system. Whether you're installing a high-performance header, replacing a stock manifold, or performing routine maintenance, these metric-spec bolts provide the precise fitment and reliability that modern engine work demands. Exhaust fasteners face extreme thermal cycling, vibration, and corrosion—making quality hardware non-negotiable for longevity and safety.

MR. GASKET's metric bolts are engineered to withstand the punishing environment of the exhaust tract, where temperatures regularly exceed 500°F and thermal expansion creates constant stress on fastener threads. The metric specification ensures precise compatibility with modern exhaust manifolds and headers that use metric threading, eliminating the guesswork of mixed fastener systems. These bolts are manufactured to exacting standards with heat-treated alloy steel construction, providing superior shear strength and resistance to seizing—a critical concern when dealing with exhaust hardware that may need future removal or adjustment.

This fastener kit is ideal for mechanics, performance enthusiasts, and DIY builders working on import vehicles, modern domestic engines, or any platform featuring metric exhaust fasteners. Installation is straightforward: use these bolts when mounting your header or manifold to the engine block or cylinder head, applying thread-locking compound for added vibration resistance. Keep a set on hand for any exhaust work—header installation, manifold gasket replacement, or aftermarket exhaust mounting—and you'll have the right fasteners for a professional, long-lasting connection.