Chevrolet Small Block 265-400 (Rectangle Port) Exhaust Flange


Includes one pair of exhaust flanges 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.


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. 

2 reviews for Chevrolet Small Block 265-400 (Rectangle Port) Exhaust Flange

  1. John K. (verified owner)

  2. Sean M. (verified owner)

    Great high quality flanges, minimal cleaning up to to and bolted right on. Would definitely recommend

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