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Pontiac 326-455 Straight Lake Header Kit


Includes One Straight Lake Header Kit for the Pontiac V8 326, 350, 455 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.


Kit includes: 

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

1 – 1-5/8″ OD, 0.065″ wall plain steel (not aluminized!) 180 degree mandrel bend

6 – 1-5/8″, 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:

Pontiac V8

            326 cu. in (1953-54)

            350 cu in (1955-56)

            455 cu in (1957-59)

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


Ports designed to be used with 1-5/8” exhaust tubing.


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

1 review for Pontiac 326-455 Straight Lake Header Kit

  1. Jason Slay (verified owner)

    Very nice quality but only one complaint .on Pontiac v8s the header pipe from head points down .for lake style headers you need to add a bend at this point so the headers come out like they are supposed to. The pipe in the kit is too short to bend .but overall quality and staff are top notch thank you again for having something that nobody else sells

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