OS Speed 21XZ-B Spec II Piston & Sleeve Assembly
Item No: 22423100 - RC Engine Part
This is a replacement O.S. Speed 21XZ-B Spec II Cylinder & Piston Assembly.
NOTE: You will need to detach the old connecting rod and re-attach it to the new piston during replacement. We recommend that when you replace the piston/sleeve on any engine, you also change the connecting rod and wrist pin clips.