.040" (1mm) Copper Gasket for 4 Bolt Engine
Zen/CY Copper Gasket 040" for 4 Bolt Engine
Reuseable copper cylinder gasket. Fits Zenoah G240RC / G270RC / G231PUH / G260PUH / G260PU / G231PUM / G260PUM CY F240RC / F270RC engines (i.e. 4-bolt cylinder style engines). Also fits TS 4-bolt billet crankcases. Copper gasket is .040" (1.00mm) 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.