Top-end Kit includes: 2 SBT Pistons 2 Ring Sets 2 Wrist-Pins 2 Wrist-Pin Bearings 2 C-Clips 1 Base Gasket 1 Water Jacket O-Ring Set 2 R.A.V.E. Valve Housing Gaskets Exhaust Gasket(s). Additional purchase of RAVE rebuild kits 46-111 is recommended.