O.S. 21 V-Spec II & .12XZ Speed rebuild kits

New for the .21 V-Spec II Speed Racing 4 port and .12XZ Speed, O.S. Engines have released these new rebuild kits. Both kits feature a hardened chrome-plated cylinder liner for high durability and long life and a machined aluminium piston which features parallel rings that trap fuel oils and use them as a seal to enhance compression and boost power. Including everything the racer needs, the kit also comes with one connecting rod, one piston pin and two piston pin retainers.

Source: OS Engines [osengines.com]