3V Performance CNC ported LS3 11* 6 bolt head

3VL Aluminum Cylinder Head, 5 axis cnc ported, LS 6 bolt Block Chevy, 270cc Intake Runner, 68-72cc Combustion Chamber,11° Rectangular Port, Steel Retainers ,Assembled

375 cfm intake cfm tested on S/F 1020 bench ( add 15-20cfm for S/F 600 )

• 11° valve angle
• Solid, stainless 2.165” intake / 1.595” exhaust valves
• 4.000” minimum bore size

• 3VPM-1436 DUAL SPRING KIT - .650-.690" LIFT

  Spring specs:

  •170 lbs @ 1.780"

  •160 lbs @ 1.800"

  •145 lbs @ 1.850"

  •415 lbs @ 1.112

  •Coil bind @ 1.060"