+1mm stuffer stroker. Built in stuffer reduces crankcase volume, increasing primary compression. Must use with thicker base gasket or head kit.
HE23ZR/G23LH Engine - G230RC/CY23RC Engine - G260RC/CY26RC
*Notes: May require modifications to the piston for proper journal clearance on the piston skirt. May also require additional base gaskets for proper squish clearance when using with a stock cylinder. LH engines may also require replacing crank bearings with RC ones.