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 R4: .624”/.615” Valve Lift w/ 1.7 Rocker 245/256 Duration @ .050” 113LSA + 5* Advance 3400+ Stall Recommended Requires Aftermarket Pistons ...

Max Recommend Spring Pressure 520# Open Max Recommend Engine RPM 7,500 Axle Oiling System for High Spring Pressure Security Cold Forged Steel Body Heat Treated for Exceptional Wear Resistance Precision Ground Needle Roller Bearings with High Chromium Steel Axle Cold Forged Extra Long Piston, Precision Ground and Fitted High Flow Disc Style Quick Reacting Check Valve for Better Reaction Precision Oil Metering Assuring Proper Oiling to Rocker Arms Proprietary Tie-Bar System

Max Recommend Spring Pressure 460# Open Max Recommend Engine RPM 8,000 Short Travel Piston Plunger System Cold Forged Steel Body Heat Treated for Exceptional Wear Resistance Precision Ground Needle Roller Bearings with High Chromium Steel Axle Cold Forged Extra Long Piston, Precision Ground and Fitted High Flow Disc Style Quick Reacting Check Valve for Better Reaction Precision Oil Metering Assuring Proper Oiling to Rocker Arms Proprietary Tie-Bar System

Clears 4.125” stroke w/ steel rod Has two 3/4” NPT drain back ports Comes with all hardware, pick-up tube, gaskets & baffle sheet.

Clears most common chassis Clears 3.622” stroke w/ steel rod Comes with all hardware, pick-up tube, gaskets & baffle sheet.

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