Modifications include: M-cut lightweight piston with polished dome, increased compression, enlarged intake and exhaust ports with race timing, extensive transfer port modification with pocket ports, crankshaft trued and balanced with bearings set for end play and seals modified for low drag, intake block matched faced off and matched to cylinder, bored out and bell mouthed 257 or 643 carburetor, flywheel balanced, engraved water jacket, metal recoil ring.

These engines are custom made and will require at least 2 weeks to ship from order placement depending on our work load.