SBC Gen-1 V8 .060in HTS Exh Man

The SBC Gen-1 V8 .060in HTS Exh Man from Cometic Gaskets is a precision exhaust header and manifold gasket set engineered for Small Block Chevy engines requiring OEM-level sealing performance. This product addresses a critical need in high-performance and restoration builds: preventing exhaust gases from escaping at the header-to-cylinder-head interface, which degrades thermal efficiency, increases noise, and allows unburned fuel vapors to contaminate engine bays. Whether you're rebuilding a vintage muscle car, upgrading a performance platform, or maintaining fleet equipment, this gasket pair ensures reliable, long-term sealing under sustained heat and vibration cycles.

Constructed with a steel core laminate design, the SBC Gen-1 V8 .060in HTS Exh Man gasket utilizes multi-layer technology to withstand the thermal cycling and pressure spikes inherent to exhaust manifold operation. The .060-inch core thickness provides optimal compression set resistance, ensuring the gasket maintains its seal across repeated heating and cooling cycles without permanent deformation. The square port design (1.55 x 1.45 inches) matches OEM small block Chevy cylinder head configurations precisely, eliminating port mismatch that can cause localized hot spots and premature failure. The HTS designation indicates high-temperature service rating, meaning this gasket maintains integrity well above standard operating temperatures—critical for modified engines running aggressive fuel curves or extended wide-open-throttle conditions.

Technicians and engine builders working on small block Chevy platforms—from 265 to 400+ cubic inch displacement engines—will find this pair essential for any header installation, gasket replacement, or performance rebuild. Installation is straightforward: position the pair onto the cylinder head studs before bolting the manifold in place, using factory torque specifications to ensure even clamping load and gasket compression. Compatibility extends across all generations of small block Chevy engines with OEM-style square port heads, including street engines, race engines, and classic restoration projects. For maximum service life, allow the engine to cool completely before and after installation, and verify exhaust port alignment before final torque-down to prevent asymmetric gasket stress.