Header Flanges - 3/8 in. Header Flange Thickness (in.) - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Mast Motorsports Godzilla Header Flanges MN-FD2-302377

Header Flange, Godzilla, Stock, Steel, 3/8 in. Thick, Round Port Shape, Ford, Pair

Part Number: MML-MNFD2302377

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Vibrant Performance Exhaust Manifold Flanges 14331D

MANIFOLD FLANGES

Part Number: VPE-14331D

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Stainless Works Header Flanges HFLS1175

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Chevy, LS1/LS6, Fits 1.75 in. Primaries, Pair

Part Number: STW-HFLS1175

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Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

Stainless Works Header Flanges HFSBFBTADAPT

Header Flanges, Carbon Steel, 3/8 in. Thick, Ford Small Block, Fits 1.875 in. Primaries, Pair

Part Number: STW-HFSBFBTADAPT

5.0 out of 5 stars ( 1 )

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Stainless Works Header Flanges HFSBFAFR200

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Ford Small Block, AFR 225 Heads, Fits 2 in. Primaries, Pair

Part Number: STW-HFSBFAFR200

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Patriot Header Flange Kits H7831

Header Flanges, No Stubs, Steel, 0.375 in. Thick, 1.625 in. Port, Gaskets, Bolts, Pair

Part Number: PTE-H7831

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Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Vibrant Performance Exhaust Manifold Flanges 14332

Header Flange, 304 Stainless Steel, 3/8 in. Thick, Chevy LS, Pair

Part Number: VPE-14332

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Stainless Works Header Flanges HFSBFAFR188

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Ford Small Block, AFR 225 Heads, Fits 1.875 in. Primaries, Pair

Part Number: STW-HFSBFAFR188

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Stainless Works Header Flanges HFBBF1225

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Ford Big Block, Fits 2.25 in. Primaries, Pair

Part Number: STW-HFBBF1225

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Summit Racing™ Header Flanges SUM-270209

Header Flanges, Steel, 3/8 in. Thick, 2.000 in. Diameter D-Port, Mopar Hemi Gen III, Pair

Part Number: SUM-270209

5.0 out of 5 stars ( 1 )

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Vibrant Performance Exhaust Manifold Flanges for 2012-2016 IMPREZA - 14220S

Header Flange, 304 Stainless Steel, 3/8 in. Thick, Subaru, EJ20, Pair

Part Number: VPE-14220S

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Summit Racing™ Header Flanges SUM-670204SS

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, 2.00 in. Diameter Round Port, 7.3 Ford Godzilla 21'-up, Pair

Part Number: SUM-670204SS

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Patriot Header Flange Kits H7829

Header Flanges, No Stubs, Steel, 0.375 in. Thick, 2.125 in. Port, Gaskets, Bolts, Ford, 390-428 FE, Pair

Part Number: PTE-H7829

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Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Kooks Headers Header Flanges 7040-S

Header Flanges, No Stubs, Stainless, 0.375 in. Thick, 2.125 in. Port, Each

Part Number: KOK-7040S

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Estimated Ship Date: Dec 30, 2025 if ordered today

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Estimated Ship Date: Dec 30, 2025 if ordered today

Stainless Works Header Flanges HFJP61188

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Hemi 5.7L/6.1L/6.4L, Fits 1.875 in. Primaries, Pair

Part Number: STW-HFJP61188

2.0 out of 5 stars ( 1 )

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Summit Racing™ Header Flanges SUM-670204

Header Flanges, Steel, 3/8 in. Thick, 2.00 in. Diameter Round Port, 7.3 Ford Godzilla 21'-up, Pair

Part Number: SUM-670204

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Patriot Header Flange Kits H7832

Header Flanges, No Stubs, Steel, 0.375 in. Thick, 1.750 in. Port, Gaskets, Bolts, Pair

Part Number: PTE-H7832

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Summit Racing™ Header Flanges SUM-270209ST

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, 2.000 in. Diameter D-Port, Mopar Hemi Gen III, Pair

Part Number: SUM-270209ST

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Kooks Headers Header Flanges 7051-BS

Header Flanges, No Stubs, Stainless, 0.375 in. Thick, 2.000 in. Port, Each

Part Number: KOK-7051BS

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Estimated Ship Date: Dec 30, 2025 if ordered today

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Estimated Ship Date: Dec 30, 2025 if ordered today

Vibrant Performance Exhaust Manifold Flanges for 1999-2000 CIVIC, 1994-1997 CIVIC DEL SOL, 1988-1991 PRELUDE - 1460

Header Flange, 304 Stainless Steel, 3/8 in. Thick, for use on Honda®, B-Series, Each

Part Number: VPE-1460

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Summit Racing™ Header Flanges SUM-270205

Header Flanges, Steel, 3/8 in. Thick, 1.875 in. Diameter D-Port, Mopar Hemi Gen III, Pair

Part Number: SUM-270205

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Kooks Headers Header Flanges 7011-S

Header Flanges, Outer Flange, No Stubs, Stainless, 0.375 in. Thick, 2.000 in. Port, Gaskets, Bolts, Each

Part Number: KOK-7011S

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Estimated Ship Date: Dec 30, 2025 if ordered today

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Estimated Ship Date: Dec 30, 2025 if ordered today

Stainless Works Header Flanges HFBBC200

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Chevy Big Block, Fits 2 in. Primaries, Pair

Part Number: STW-HFBBC200

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Stainless Works Header Flanges HFJP61175

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Hemi 5.7L/6.1L/6.4L, Fits 1.75 in. Primaries, Pair

Part Number: STW-HFJP61175

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Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

Stainless Works Header Flanges HFSBF1

Header Flanges, 304 Stainless Steel, 3/8 in. Thick, Ford Small Block, Fits 1.625 in. Primaries, Pair

Part Number: STW-HFSBF1

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Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today