Mr. Gasket Copperseal Header Gasket - 1.630 Round Port - Copper - Small Block Chevy - Pair H759C04M an infinite fatigue life and

an infinite fatigue life and absolute minimum weight

for current sensing data

each able to handle up to 15 amps continuously

We changed some little things like the thickness of the retainer and the size of the tabs to make this a much better and longer lasting part

With its aluminum case and extension housing

Mr. Gasket Copperseal Header Gasket - 1.630 Round Port - Copper - Small Block Chevy - Pair H759C04M an infinite fatigue life andCopperseal Exhaust Gaskets 262 400 1955 91 Round Port For Headers 1. 63 DIA. Manufactured from high temperature steel core graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities, high recovery material