Winderosa 810800 Top End Engine Gasket Kit Fits: Arctic Cat 400 2x4 1998 - 2001, 400 4x4 1998 - 2000, 400 4x4 w/MT 2001 - 2002, 454 2x4 1997 - 1998, 454 4x4 1996 - 1998 Includes every gasket, O-ring and seal required to Rebuild a top end; valve seals, head, base, exhaust, and other misc. Gaskets/O-rings (formed rubber valve cover gasket not included) Winderosa top end gasket Sets are designed for a piston replacement, delivering best-in-class value by offering the right balance of price and performance Constructed from quality materials that meet or exceed OEM specifications Made in the USA