Mopar Small Block 318-360 Straight Lake Header Kit


Includes One Straight Lake Header Kit for the Small Block Mopar 318, 340, 360 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.


Kit includes: 

1 pair – 30″ long steel megaphones (1-5/8″ inlet & 3-1/2″ outlet) – 4″ outlet available (Include in order notes)

2 – 1-3/4″ OD, 0.065″ wall plain steel (not aluminized!) 70 degree mandrel bends

6 – 1-3/4″, 0.065 wall, 10″ long plain steel tubing

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:


            318 cu. in (1957-89)

            340 cu in (1968-91)

            360 cu in (1968-91)

Dodge Truck

            318LA cu in (1959-2001)

            360 cu in (1971-2001)

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


Ports designed to be used with 1 3/4” exhaust tubing.


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

1 review for Mopar Small Block 318-360 Straight Lake Header Kit

  1. kevin

    I love this kit! great craftsmanship.

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