Brand new gasket kit includes head, base, water outlet, chain tensioner and exhaust gasket to rebuild the top end of your Polaris RZR 900. Don't ever re-use old gaskets when rebuilding your engine! This gasket kit includes all the gaskets shown including: Head Gasket (Replaces Polaris # 5813439) Base Gasket (Replaces Polaris # 5253037) Exhaust Gaskets (2) (Replaces Polaris # 5253989) Chain Tensioner Gasket (Replaces Polaris # 5813449) Water Inlet Cover Gaskets (2) (Replaces Polaris # 5813742, 5813521) This kit fits the following models: 2011-14 RZR 900 (All Models)