From hot street trucks to service trucks.

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