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Pontiac Header Flanges

Our American Made Pontiac header flanges are precision CNC laser jet cut from 3/8” stainless steel or 1018 cold rolled steel.
Stainless Header Mfg., Inc. offers the finest in CNC laser cut header flanges. While most header flanges are made from 1/4" or 5/16" material, our are precision CNC laser cut header flanges are cut from from 3/8" material. We offer our flanges in 304 stainless steel or 1018 cold rolled steel. The heavier material we use to fabricate our flanges greatly reduce the warping problems seen in other lighter flanges. Make sure to ask about custom header flanges.

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Pontiac 400/455 D-Port Mild Steel Header Flange
Pontiac 400/455 D-Port Mild Steel Header Flange
Our Price: $34.95

Precision laser cut from 3/8" thick mild steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the Pontiac 400/455 cubic inch blocks used in a wide variety of Pontiac vehicles from 1955-1976.
Port Size:1.801"
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Pontiac 400/455 Ram Air IV Round Port Mild Steel Header Flangeel Header Flange
Pontiac 400/455 Ram Air IV Round Port Mild Steel Header Flangeel Header Flange
Our Price: $34.95

These header flanges are specifically made for Ram Air IV style Pontiac V8 heads. Modeled after the 1969-1970 GTO heads, Edelbrock Performer RPM and KRE High Port heads use the same bolt pattern.

Port Size: 1 7/8" and 2" Round Port are available.

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Pontiac 400/455 Ram Air IV D-Port Mild Steel Header Flange
Pontiac 400/455 Ram Air IV D-Port Mild Steel Header Flange
Our Price: $34.95

These header flanges are specifically made for Ram Air IV style Pontiac V8 heads. Modeled after the 1969-1970 GTO heads, Edelbrock Performer RPM and KRE High Port heads use the same bolt pattern.

Port Size: 1.862"

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Pontiac 400/455 Ram Air V Mild Steel Header Flange
Pontiac 400/455 Ram Air V Mild Steel Header Flange
Our Price: $34.95

Precision laser cut form 3/8" thick steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for V8 Pontiac engines with a split-port Ram Air V style head. DCI Motorsports makes a head which accompanies these flanges.

Port Size: 2.188 "

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Pontiac 400/455 Ram Air V Round Port Mild Steel Header Flange
Pontiac 400/455 Ram Air V Round Port Mild Steel Header Flange
Our Price: $34.95

Precision laser cut form 3/8" thick steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for V8 Pontiac engines with a split-port Ram Air V round port head. DCI Motorsports makes a head which accompanies these flanges.

Port Size: 2.130" Round Port

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