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Only the original style LS 5
As Cast affordable intake and exhaust ports with CNC Chambers
As cast VS CNC intake port back to back flow test
CID DM 470 Symmetrical Port Big Block Chevy Heads with as cast ports. (Price per pair BARE) Upgrade:Bronze Seat Upgrade See Brandon's achievements in thePRODUCT DESCRIPTION The CID DM470 Big Block Chevy Cylinder Heads flow an impressive 470+ CFM from as cast ports! This allows us to offer serious performance from an affordable cylinder head and intake package. These symmetrical port BB Chevy cylinder heads no longer have left and right unequal length runners. We straightened up the valve angles to move away from the factory bath tub chambers and to a smaller more efficient combustion chamber. In order
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