Brand new big bore Hyway cylinder with pop up extra compression piston kit. Brand new Hyway Titanikel Big Bore 56mm cylinder and POP UP extra compression piston kit. Fits Stihl chainsaw models MS660 and 066. Titanikel is Hyways highest quality kit. These kits are top of the food chain when it comes to aftermarket cylinder and pistons for chainsaws.This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Chainsaw Parts". The seller is "wagners_chainsaw" and is located in this country: US. This item can be shipped worldwide.