Includes One Swept Lake Header Kit for the Buick Nailhead 364-425 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 a light coated lightly with oil to prevent rusting. The end result is less work to clean off the mill scale as needed with hot rolled mild steel.
1 pair – 30″ long steel megaphones (1-5/8″ inlet & 3-1/2″ outlet)
8 – 1 3/4″ OD, 0.065″ wall plain steel (not aluminized!) 70 degree mandrel bends
1 pair – 3/8″ thick exhaust flanges – specific motor application listed above
(photo is shown just for reference, contents listed above is actually what you will receive)
364 cu. in (1957-61)
401 cu in (1959-66)
425 cu in (1963-66)
Ports designed to be used with 1 3/4” exhaust tubing.