Chevrolet Small Block 265-400 Swept Lake Header Kit (Rectangle Port)


Includes One Swept 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 into order notes

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

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 3/4” exhaust tubing.


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


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