aluminium small block chevrolet cylinder head assembly 180cc intake 72cc chamber straight plug pair

- Cylinder Head Material A356.0 Aluminum
- Exhaust Runner Volume 70cc 
- Intake Valve Diameter (in) 2.020 in.
  - Exhaust Valve Diameter (in) 1.600 in. 
- Maximum Valve Lift (in) 0.575 in. 
- Number of Springs Per Valve Dual