.040" (1mm) Copper Cylinder Gasket

Reuseable copper cylinder gasket. Copper gasket is .040" (1mm) thick, double the thickness of a stock gasket. By installing this gasket, you will increase your squish clearance, allowing installation of stroker crankshafts for increased engine displacement. This stronger gasket resists leaking and blowout.

This copper gasket will not fit on the GP290 cylinder / crankcase with the 40mm boss. To use on the wider skirts, the gasket will need to be manually enlarged to fit on the cylinder.