Chevrolet Small Block 265-400 Straight Lake Header Kit


Includes One Straight Lake Header Kit for the Small Block Chevrolet 262-400 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.  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 – please add to order notes

2 – 1-5/8″ OD, 0.065″ wall plain steel (not aluminized!) mandrel bends

6 – 1-5/8″ OD, 0.065 wall, 10″ long 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:

Chevrolet V8

            262 cu. in (1975-76)

            265 cu in (1955-57)

            267 cu in (1979-82)

            283 cu in (1957-67)

            302 cu in (1967-69)

            305 cu in (1976-93)

            307 cu in (1980-90)

            327 cu in (1962-69)

            350 cu in (1967-93)

            400 cu in (1970-76)

            *more applications/years may work, 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. 


There are no reviews yet.

Be the first to review “Chevrolet Small Block 265-400 Straight Lake Header Kit”
Scroll to Top