Cylinder Works Big Bore Gasket Kit Polaris 900 / 1000 Cylinder Works Big Bore Gasket Kits are comprised of all vital gaskets for top end rebuilding. Manufactured in the USA in collaboration with Vertex, these gaskets surpass OEM quality standards. They're tailored to fit popular Cylinder Works oversized bore performance kits and Vertex aftermarket pistons perfectly. Each kit includes not only head, base, and exhaust gaskets but also the crucial O-rings for easy removal of the cylinder and head. Fitment: Replacement for Cylinder Works Big Bore Cylinder Kits #61003-K01, 61004-K01, 61006-K01 and Cw61007K01 Specifications: Type: Top end gasket kit Cylinder Diameter: 98 mm Cylinder Kit Type: Big bore Gaskets Included: Head, water inlet gasket, base, exhaust and cam chain tensioner gaskets Size Over Standard Bore: 5 mm Note : Image for reference only. Kits vary based on application.