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Message: [QUOTE="Extended Power, post: 1318734, member: 898"] River City Diesel also offers cams in different stages. Stage 4 has some serious lift.... The RCD stage 4 cam has way more lift than the Colt stage 4 cam. 1000 hp has been done with stock cams before the aftermarket cams were even available. Here is RCD specs: (notice it says the stock cam was designed to promote EGR flow, and these were for efficiency.) Stage 1 $649 Drop in replacement with corrected valve timing increased lift and duration for efficiency VS the OEM grind that was designed to promote EGR Flow Works with stock valve springs and RCD upgrade 120# springs. No Piston fly-cutting required. RCD Chromoly Push Rods recommended. Duration 170IN / 185EX Valve Lift .385"IN / .368"EX Stage 2 $699 Hotter Street use. Drop in use, no piston fly-cuts required. RCD 120# Valve springs recommended for competition use. RCD Chromoly Push Rods recommended. Optimized valve timing, increased lift and duration for maximum torque, horsepower and mileage. Duration 181 IN / 195 EX Valve Lift .412"IN / .400"EX Stage 3 $749 Hot Street / Competition use. .060" Piston fly-cuts required. RCD 120# Valve springs required. RCD Chromoly Push Rods Required. Optimized valve timing, substantially increased lift and duration for maximum torque, horsepower. Duration 187IN / 208EX Valve Lift. 467"IN / .450"EX Stage 4 $799 Extreme Competition use only. 060" Piston fly-cuts required. RCD 120# Valve springs required to prevent coil-bind / valve float. 1.850" installed height RCD Chromoly Push Rods Required. Blueprinting of cylinder head required to ensure valve installed heights and to prevent coil-bind Optimized valve timing, substantially increased lift and duration for maximum torque, horsepower in competition vehicles. Duration 197IN / 218EX Valve Lift .518"IN / .500"EX [/QUOTE]