Includes One Swept Lake Header Kit for the Cadillac 331 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 and a surface ready to weld to.

Kit includes:

1 pair – 30″ long steel megaphones (1-5/8″ inlet & 3-1/2″ outlet) – 4″ outlet available upon request

2 – 2″ OD, 0.065″ wall plain steel (not aluminized!) 70 degree mandrel bends

4 – 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 below

(photo is shown just for reference, contents listed above is actually what you will receive)

Motor Application:

Cadillac

331 cu. in (1952-55)

*more applications/years may work, verify before purchasing.

Ports designed to be used with 1-3/4″ (end ports) and 2″ (center port) exhaust tubing.

These flanges are designed in CAD and are test fit on an actual head to make sure proper fitment is achieved.