Veney Hemi alch/fuel head header flange set. These header flanges are for the do it yourself racer that likes to make there own headers. They are flame cut from .375 steel plate and are ready for your imagination to run wild in building a set of custom pipes. RBS carries a full line of copper exhaust gaskets to compliment your bitchin new pipes. Ports measure 2.750" x 2.250" and are oval port. Header flanges should fit most Veney alch/fuel heads that use the ten 3/8" bolt header flange.