Cylinder Works Big Bore Gasket Kit Honda Sportrax Trx450R 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. Specifications: Type: Top end gasket kit Cylinder Diameter: 97 mm Cylinder Kit Type: Big bore Gaskets Included: Head, base, exhaust and cam chain tensioner gaskets Size Over Standard Bore: 3 mm Note : Image for reference only. Kits vary based on application.