BMW M3 E30 S14B23 1986-1991

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BMW M3 E30 S14B23 1986-1991

BMW M3 E30 S14B23 1986-1991

BMW M3 E30 S14B23 1986-1991 

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BMW M3 E30 S14B23 1986-1991

This page covers the 16V S14B23 four-cylinder of the BMW M3 E30, built from 1986 to 1991.

Forged pistons run from 93.4 to 94.5mm bore, with a 22mm gudgeon pin, in the WÖSSNER, JE PISTONS FSR and WISECO ranges, from 8:1 to 13.1:1 compression. Both ZRP forged crankshafts for the S14 are here, in 2.3 L and 2.5 L, alongside the I-beam ZRP rods. Then come CATCAMS camshafts and cam followers, SUPERTECH valves, guides, stem seals, springs and titanium retainers, ARP head studs, main studs and con rod bolts, ATHENA and COMETIC head gaskets, ACL and KING RACING bearings, FIC injectors and VIBRA-TECHNICS mounts.