Includes one pair of intake flanges for the Big Block Cadillac 425, 472, 500 hot rod motor (see motor applications below). These flanges are cut with a CNC HD (High Definition) Plasma cutter out of 3/8” Pickled and Oiled (P&O) steel. P&O material is hot rolled steel that has been dipped in acid to remove the mill scale and then lightly coated with oil. The end result is less work to clean off the mill scale as needed with hot rolled mild steel.
Big Block Cadillac
425 cu. in (1977-79)
472 cu in (1968-74)
500 cu in (1970-76)
*more applications/years may work, verify before purchasing.
Ports designed to be used with 2” exhaust tubing.
In addition to the pair of flanges, you also receive 12 custom machined angled spacers from DOM tubing. These spacers will allow the bolts to be threaded into the heads while allowing the bolt head to apply even pressure to the intake flange. These spacers come loose, unwelded but can be tacked in place once you build the intake. This listing does not include the metal to cover the lifter valley of the motor but can be easily fabricated using flat plate.
We are the only manufacturer of intake flanges for this motor. Now you have the ability to build your own custom intake!
These flanges are designed in CAD and are test fit on an actual head to make sure proper fitment is achieved.