Chevy SBC 350 Vortec 180cc 64cc Straight Cast Iron Bare Cylinder Head They feature extra-thick steel that's

They feature extra-thick steel that's double-welded to the ring gear for added strength

Flat surfaces are finished with CNC machine center for accuracy and smoothness

They are designed to ensure belt retention at high rpm

leading to valve seat damage and early valve grind

plus a reserve

Chevy SBC 350 Vortec 180cc 64cc Straight Cast Iron Bare Cylinder Head They feature extra-thick steel that'sAll Speedmaster 23deg. Small Block Chevy heads are available with Straight or Angled sparkplugs. Standard valve sizes are 2. 020 in. Intake, and 1. 600 in. Exhaust, both +. 100 in. length. While the 2. 02" valves are standard issue, all of our 23deg. aluminum heads can accept a 2. 050 in. intake valve with minimal additional work.