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Message: <blockquote data-quote="Chris Cab" data-source="post: 70616" data-attributes="member: 109">Dunno how much a used S50 crank goes for in Malaysia, but the custom pistons (JE, Wiseco, or Ross Racing) will run around US$800-950.....obviously a more aggressive cam will cost around US$350-500 depending on the one you choose....and so on.   It's not cheap to build an M20, but modifying the S50 crank & buying your pistons direct from a manufacturer is alot cheaper than buying the 3.0L stroker kits available on the market.The least expensive way to build an M20 is a 2.7L stroker.  As mentioned by someone above it makes great power for the E30....appx 190hp (similar to an M50B25).    Take a ride in Tom's car if you have a chance.....very fun ride <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>