Mild Steel Header Flanges

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Mild Steel Header Flanges

Mild Steel Header Flanges

Our 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. These header flanges are U.S. made.

Make sure to ask about custom header flanges.

4-Slot Mild Steel Cobra Kit Car Collector Flange

This 4-Bolt collector flange is precision laser-cut from true American made Mild Steel, and is 3/8" thick. These flanges have slot-holes for fine-tuning any header positioning your build may require. It is the perfect fit for any Cobra Kit Car application requiring a 4-bolt flange. The ports are available in 1 3/4" and 2" diameter holes to accompany those sizes of tubing.

$44.95

Porsche 944 Mild Steel Header Flange-Inline Bolt Pattern

These header flanges are specifically made for the inline 4 engine used in Porsche 944s from 1982-1991.

Port Size: 1.760"

$44.95

Porsche 944 Mild Steel Header Flange- Angled Bolt Pattern

These header flanges are specifically made for the inline 4 engine used in Porsche 944s from 1982-1991.

Port Size: 1.752"

$44.95

Porsche 911 Carrera 996 Mild Steel Header Flange

Precision laser cut from 3/8" thick mild steel, our header flanges are manufactured in the U.S.A. and are machine surfaced. These header flanges are specifically made for the flat-6 engine of all 996-generation Porsche 911 variants from 1999-2004.
Port Size: 2.087"

$44.95

Pontiac 400/455 Ram Air V Round Port Mild Steel Header Flange

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

$44.95

Pontiac 400/455 Ram Air V Mild Steel Header Flange

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"

$44.95

Pontiac 400/455 Ram Air IV D-Port Mild Steel Header Flange

Pontiac 400/455 Ram Air IV "SAP" Mild Steel Header Flange

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"

$44.95

Pontiac 400/455 Ram Air IV Round Port Mild Steel Header Flange

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.

$44.95

Pontiac 400/455 D-Port Mild Steel Header Flange

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"

$44.95

Oldsmobile 455 Mild Steel Header Flange- 2 1/4" Port

Precision laser cut from 3/8" thick mild steel, our header flanges are manufactured in the U.S.A. and are machine surfaced. These header flanges are specifically made for the Oldsmobile 455 engines.
Port Size: 2.274"

$44.95

Nissan RB25 Stainless Header Flange

Precision laser cut form 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 Nissan RB25 DE/DET straight 6 engines used from 1989-1994, most notable the R32 Skyline GTR.

Port Size: 1.571"

$111.95

Nissan 2.4L KA Mild Steel Header Flange

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 Nissan 2.4L I-4 found in all KA engine-family vehicles. KA engines can be found in the 240SX, Frontier, and Xterra, each in a variety of years from 1991-2004.
Port Size: 1.746"

$44.95

Nissan GT-R R35 Mild Steel Header Flange

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 Nissan 3.8L V6 found in the R35 GT-R from 2008-current. Our flange is compatible with all R35 editions, including the NISMO, Black Edition, SPEC-V, and N-Attack
Port Size: 1.725"

$39.95

Nissan 4.0L V-6 Mild Steel Header Flange

Nissan 3.8L V-6 Mild Steel Header Flange

$39.95

Mazda Miata 1.8L BP Mild Steel Header Flange

These header flanges are specifically made for the Mazda 1.8L BP engines found in 1994-2004 Ford and Mazda passenger vehicles.

Port Size: 1.940"

$44.95

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