High Performance Forged Piston Kits 8.4-1, and 9.5-1 Compression Ratio. R&D/CP Forged Racing Piston Kits have been developed for the hard core race enthusiasts or precision engine builders who are looking to gain maximum horsepower and reliability from their racing engines. R&D offers high quality forged aluminum, heat treated, and CNC machined racing pistons in stock or oversized, and in 8.4-1(OEM) or 9.5-1 compression ratios to replace O.E.M. cast aluminum pistons known to be less reliable in high performance, high heat boosted conditions. High horsepower marine engines with high boost pressures are more prone to have detonation over conventional racing engines due to sustained loads. Forged pistons in marine applications are a must. Whatever performance platform you are planning to build, trust the pros at R&D with all your compression ratio, boost, and engine management needs. R&D recommends upgrading to our High Performance Pistons and Rods in applications producing over 300 H.P. @ sustained RPM's 8,000+. Direct replacement piston kits for High H.P. applications High quality forged materials replace low performance cast Improved ring seal with Nascar Style ring sets Increased RPMs and horsepower by reducing weight Works great with high boost compressor wheels and turbo kits R&D/CP Pt. # 432-10083 Replacement Ring kit Specify Piston Size (for 1 Piston) Pt. # 432-10084 for 8.4-1 compression, OEM Replacement (3 Piston Kit) Pt. # 432-10095 for 9.5-1 compression, OEM Bore (3 Piston Kit) .25 mm Oversize Pt. # 432-10284 for 8.4-1 compression, .25mm Oversize (3 Piston Kit) Pt. # 432-10295 for 9.5-1 compression, .25mm Oversize (3 Piston Kit) .50 mm Oversize Pt. # 432-10584 for 8.4-1 compression, .50 mm Oversize (3 Piston Kit) Pt. # 432-10595 for 9.5-1 compression, .50 mm Oversize (3 Piston Kit) Piston kits Retail $649.95 Replacement ring kit $44.95
