Turbo R1: .615”/.610” Valve Lift w/ 1.7 Rocker 229/232 Duration @ .050” 114LSA + 4* Advance 1800-2200 Stall Recommended Moderate Chop Turbo R2: .619”/.614” Valve Lift w/ 1.7 Rocker 233/236 Duration @ .050” 114LSA + 4* Advance 2400-2800 Stall Recommended Moderate/Aggressive Chop Turbo R3 Stroker: .624”/.615” Valve Lift w/ 1.7 Rocker 243/248 Duration @ .050” 114LSA + 2* Advance 3400+ Stall Recommended Requires Aftermarket Pistons Very Aggressive Chop

Rectangle Port R1: .610”/.612” Valve Lift w/ 1.7 Rocker 223/234 Duration @ .050” 113LSA + 4* Advance 1800-2200 Stall Recommended Mild Chop Rectangle Port R2: .615”/.615” Valve Lift w/ 1.7 Rocker 229/242 Duration @ .050” 112LSA + 4* Advance 2400-2800 Stall Recommended Moderate Chop Rectangle Port R3: .618”/.615” Valve Lift w/ 1.7 Rocker 233/250 Duration @ .050” 113LSA + 5* Advance 3400+ Stall Recommended MAX Duration for Stock Pistons w/ Unmilled Heads Very Aggressive Chop Rectangle Port...

Cathedral Port R1: .612”/.607” Valve Lift w/ 1.7 Rocker 225/228 Duration @ .050” 113LSA + 4* Advance 1800-2200 Stall Recommended Mild Chop Cathedral Port R2: .617”/.614” Valve Lift w/ 1.7 Rocker 231/236 Duration @ .050” 112LSA + 4* Advance 2400-2800 Stall Recommended Moderate Chop Cathedral Port R3: .621”/.615” Valve Lift w/ 1.7 Rocker 235/244 Duration @ .050” 114.5LSA + 4.5* Advance 3400+ Stall Recommended MAX Duration for Stock Pistons w/ Unmilled Heads Very Aggressive Chop Cathedral ...