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Buick Nailhead 364-425 Exhaust Flange Straight Lake Header Kit


Includes One Straight Lake Header Kit for the Buick Nailhead 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 upon request

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

6 – 1-5/8″ OD, 0.065″ wall, 10″ long plain steel tubing

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)


Motor Application:

Buick Nailhead

            364 cu. in (1957-61)

            401 cu in (1959-66)

            425 cu in (1963-66)


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

3 reviews for Buick Nailhead 364-425 Exhaust Flange Straight Lake Header Kit

  1. dana.devane@yahoo.com (verified owner)

    I really didn’t know what to expect since the price was so awesome. The quality, craftsmanship and customer service is truly top notch. Saying outstanding is not saying enough. I have 4 more hot rods and they will all have exhaust from Hell’ Gate! Thank you!

    Oh and if you guys could make a flange for an Olds 394 i’d Make it 5 cars with your exhaust

  2. John Gibbs (verified owner)

  3. Billy (verified owner)

    It would have been nice to have the option of collectors and block off plates

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