Header Gasket - SBC 1-3/4 Rect. Port

The Header Gasket - SBC 1-3/4 Rect. Port by HEDMAN is an essential sealing component designed for small-block Chevy engines equipped with 1.750-inch square-port headers. This composite gasket pair prevents exhaust leaks at the critical junction between the header flange and cylinder head, where extreme heat and pressure cycles demand reliable performance. Mechanics and engine builders rely on quality header gaskets to maintain exhaust system integrity and prevent reversion that compromises scavenging efficiency.

Manufactured from advanced composite material, this gasket withstands the thermal stress and vibration inherent to high-performance exhaust systems. The composite construction offers superior conformability compared to traditional metal gaskets, sealing minor surface irregularities on both the header port and cylinder head while resisting blow-out from combustion pressure spikes. The 1.750-inch rectangular port design matches OEM and aftermarket header specifications for small-block Chevy applications, ensuring precise alignment and maximum sealing surface contact during installation.

This gasket pair is essential for any SBC engine swap, header upgrade, or cylinder head service requiring exhaust seal replacement. Whether you're building a street engine, restomod, or performance platform, proper header-to-head gaskets eliminate exhaust leaks that waste horsepower and create diagnostic headaches. Compress and torque evenly to manufacturer specifications using a crisscross pattern to achieve uniform clamping load and prevent gasket creep over extended driving seasons.