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.

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

  1. Steven (verified owner)

    Everything is excellent perfect service

  2. Billy (verified owner)

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

  3. John Gibbs (verified owner)

  4. 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

Add a review
Scroll to Top