New SBT Brand Short Block for Sea-Doo 787/800 motor. Assembled through the cylinders and comes with all new internals and SBT castings. Includes: Engine Crankcase Top End Cylinder Gaskets/O-Rings Crankshaft Rods and wrist-pin bearings Pistons & Rings, Rave Valve & Housing Installation gasket kit Cast Aluminum Body 1995 XP800 1996 Challenger 1996 GSX 1996 GTX 1996 XP 1997 Challenger 1997 Challenger 1800 1997 GSX 1997 GTX 1997 SPX 1997 XP 1998 Challenger 1998 Challenger 1800 1998 Speedster 1998 SPX 1999 Challenger 1800 1999 Speedster 1999 SPX