BBC Big Block Chevy Aluminum Cylinder Heads Bare Casting 345cc Rectangle Port


  • Combustion chamber volume: 124cc
  • Intake runner volume: 345cc
  • 2.250″ Intake Valve
  • 1.880″ Exhaust Valve


This bare assembly is a great starting point for a performance engine build. It’s designed for maximum flow and performance in the hands of a skilled builder or machine shop. It features a thick deck to help resist warping and comes with threaded bolt holes on the ends for an easy installation.

These cylinder heads are sold in pairs as bare assemblies. To achieve maximum performance, it is recommended that a licensed engine builder or machine shop coordinate matching short block and engine internals.


Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to