Copper Cylinder Gasket 4 Bolt .040"/ 1mm
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Copper Cylinder Gasket For 4 Bolt Engine Upgrade .040" - 1mm

This Gasket requires a A high temp gasket sealer RTV grey or copper it also is less likely to blowout and can be reused

Reuseable copper cylinder gasket.

 (i.e. 4-bolt cylinder style engines).  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.

Will Fit: 36 x 44mm hole centres

Zenoah:  Zenoah G240RC , G270RC , G231PUH , G260PUH , G260PU , G231PUM /,G260PUM, G270RC,G290RCengines

Chung Yang: CY F270 engines

Rovan PRC 4 Bolt Engines 26-30.5cc

Also fits TS 4-bolt billet crankcases