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Oldsmobile Big Block 350-455 Exhaust Flange
Oldsmobile Big Block 350-455 Exhaust Flange
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Oldsmobile Big Block 350-455 Exhaust Flange
Oldsmobile Big Block 350-455 Exhaust Flange
Home Products Tube Size 2" Oldsmobile Big Block 350-455 Exhaust Flange
Ford Y-Block 239-312 Exhaust Flange
Ford Y-Block 239-312 Exhaust Flange $62.00 – $152.00
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Chevrolet Early 6 cyl 216-261 Exhaust Flange
Chevrolet Early 6 cyl 216-261 Exhaust Flange $62.00 – $152.00

Oldsmobile Big Block 350-455 Exhaust Flange

Rated 5.00 out of 5 based on 3 customer ratings
(3 customer reviews)

$62.00 – $152.00

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SKU: 001-0025 Categories: 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 2", 350, 400, 403, 425, 455, Engine Size, Exhaust/Header Flanges, Flanges, Make, Oldsmobile, Tube Size, Year
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  • Description
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  • Reviews (3)
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Description

Includes one pair of exhaust flanges for the BigĀ  Block Oldsmobile 400, 425, 455 hot rod motor (see motor applications below).Ā  These flanges are cut with a CNC HD (High Definition) Plasma cutter out of 3/8ā€ Pickled and Oiled (P&O) steel.Ā  P&O material is hot rolled steel that has been dipped in acid to remove the mill scale and then lightly coated with oil.Ā  The end result is less work to clean off the mill scale as needed with hot rolled mild steel.

 

Motor Application:

Big Block Oldsmobile

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā  400 cu. in (1965-74)

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā  425 cu in (1965-74)

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā  455 cu in (1965-74)

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā  *more applications/years may work, verify before purchasing.

 

Ports designed to be used with 2ā€ exhaust tubing.

 

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

Additional information
Weight 6 lbs
Dimensions 20 × 4 × 4 in
Stubbed Flange

No – Flange Only, Yes – Stubbed Flange

Reviews (3)

3 reviews for Oldsmobile Big Block 350-455 Exhaust Flange

  1. Frank Davenport (verified owner) – January 27, 2021

    Rated 5 out of 5

    Second time I’ve bought exhaust flanges from here. Great products and will use for future builds.

  2. Anonymous – August 2, 2016

    Rated 5 out of 5

    worked good,not the prettiest welds but i’ll credit that to my crappy century welder, and my incompetence.

  3. Anonymous – October 13, 2014

    Rated 5 out of 5

    The flanges fit perfectly, clean and flat.I only wish I new the rectangle stub tubes needed to be welded in at the factory, well I will have that done real soon

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