CID DM 500 CNC Ported Symmetrical Port Big Block Chevy heads (Price per pair BARE) Chamber Softening These work especially well in

These work especially well in Nitrous Oxide and Turbo applications

CID LS Inline 450 CFM Oval Port BE Cylinder Heads

Application Specific: Designed for NA Applications with RPM range 7500-9000 and ALL Centrifugal and Turbo applications

The CID Heads BA LS7 intake manifold has an overall height of 9

Near equal length runners with a choice of runner cross sectional openings at the plenum opening with enough material to increase area to 5

CID DM 500 CNC Ported Symmetrical Port Big Block Chevy heads (Price per pair BARE) Chamber Softening These work especially well inPRODUCT DESCRIPTION The CID DM 500 CFM Big Block Chevy head was a first for Australian Cylinder Head manufacturing at the time of their conception. Now these heads are made in the USA. At CID we wanted to address the issues associated with the factory BBC heads. First of all we wanted to make our head a symmetrical port head. No more left and right unequal length runners. We straightened up the valve angles to move away from the factory bath tub