Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits 117" to 128" for 2024 + Gen 2

 Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits117" to 128" for 2024 + Gen 2 

Increasing the size of a Milwaukee-Eight® engine is easy with Zipper’s Big Bore Cylinder Kits.  These Big Bore kits are designed for the new Gen 2 M8 engines, which have oval port heads and center cooling.

The Milwaukee-Eight® engines design is made for displacement increases and Zippers offers cylinder kits for Factory stock 4-valve head, SE heads and many Custom High Flow Heads to provide huge torque and horsepower gains.

Each of this specific bore sizes are designed to fit on the factory engine base without case boring just like like-stock installation.

4.250- 4.280 Bores

Wood Cycles offers new alloy castings with bore sizes from 4.250 to 4.280

Kits include precision fitted cylinders with tight tolerances, 2618 forged pistons with advanced ring packs, pins & clips, head and base gaskets and new head bolts. The rings custom sized to each cylinder.