DP Race series piston kit BMW M20B31 86.00mm

A complete set of top quality forged pistons including tapered wall tool steel heavy duty pins, locks and piston rings. For use in M20 with 89.6mm stroke crank. 9.0:1 comp ratio. 86mm bore. Gives an impressive 3121cc volume! Since pin is moved high on this model to be able to run 135mm rods with 89.6mm stroke they come with oil ring rail support buttons making cost a bit higher than other sets.