MCS-531794 - 89". 3-1/2" stock bore x 4-5/8" stroke. Used with stock cylinders and heads in combination with 4-5/8" stroker flywheels. Converts the stock 80" (1340cc) Evo B.T. to 89" (1459cc). Approx. 9.25:1 CR. Kits include forged pistons; wrist pins; wrist pin clips

Fitment:
84-99 Evo B.T. with 4-5/8" stroker flywheels (NU)