LS Cylinder Heads IN STOCK!

Cathedral Port Cams – Smeding Performance

Cathedral Port Cams

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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 Port R4 Stroker:

  • .624”/.615” Valve Lift w/ 1.7 Rocker
  • 249/256 Duration @ .050”
  • 112LSA + 4* Advance
  • 3400+ Stall Recommended
  • Requires Aftermarket Pistons
  • Maximum Aggression Chop

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