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2003 GMC SIERRA 1500 HD Headers

Showing In Stock Items. Show All 28 Items.

Individual Parts

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Results 1 - 15 of 15

Hedman Street Headers 69720

Hedman Street Headers 69720

Headers, Long Tube One-Piece, 1 5/8 in. Primaries, Round Port, 3 in. Collectors, 2 1/2 in. Reducers, Steel, Natural, Cadillac, Chevrolet, GMC, Pair

Part Number: HED-69720

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

JBA Performance Exhaust Cat4ward Headers 1850S-3

Headers, Cat4ward, Stainless Steel, Natural, Cadillac, Chevy, GMC, Hummer, SUV, Pickup, 6.0L, Pair

Part Number: JBA-1850S-3

4.77 out of 5 stars ( 13 )

Estimated Ship Date: Today

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Hedman Street Headers 69690

Headers, Street, Shorty, Steel, Temporary Paint, Cadillac, Chevy, GMC, Hummer, Small Block LS, Pair

Part Number: HED-69690

4.56 out of 5 stars ( 34 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

JBA Performance Exhaust Cat4ward Headers 1850S-3JS

Headers, Cat4ward, Stainless Steel, Silver Ceramic Coated, Chevy, Pickup, 6.0L, Pair

Part Number: JBA-1850S-3JS

4.79 out of 5 stars ( 14 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Hedman Street Headers 69696

Headers, Street, Shorty, Steel, Silver Ceramic Coated, Cadillac, Chevy, GMC, Hummer, Small Block LS, Pair

Part Number: HED-69696

3.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Mr. Gasket HEADLOCK Locking Header Bolts 2235G

Header Fasteners, Locking Header Bolts, Internal Allen/Hex Head, Stainless Steel, Chevy, Set of 12

Part Number: MRG-2235G

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Mr. Gasket Header Bolts 918G

Header Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

Part Number: MRG-918G

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowtech Headers 31142FLT

Headers, Shorty, Steel, Silver Ceramic Coated, Chevy, GMC, Pair

Part Number: BIG-31142FLT

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowtech Headers 11143FLT

Headers, Shorty, Steel, Temporary non-high, Temperature Paint, Pair

Part Number: BIG-11143FLT

3.57 out of 5 stars ( 7 )

Estimated Ship Date: Feb 19, 2026 if ordered today

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Estimated Ship Date: Feb 19, 2026 if ordered today

Hedman Street Headers 69723

Headers, Full-Length, Steel, Black Ceramic Coated, Cadillac, Chevrolet, GMC, Pair

Part Number: HED-69723

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

JBA Performance Exhaust Cat4ward Headers 1850S-3JT

Headers, Cat4ward, Stainless Steel, Titanium, Cadillac, Chevy, GMC, Hummer, SUV, Pickup, 6.0L, Pair

Part Number: JBA-1850S-3JT

Not Yet Reviewed

Estimated Ship Date: Feb 24, 2026 if ordered today

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Estimated Ship Date: Feb 24, 2026 if ordered today

Flowtech Headers 11142FLT

Headers, Shorty, Steel, Temporary Black Paint, Chevy, GMC, Pair

Part Number: BIG-11142FLT

Not Yet Reviewed

Estimated Ship Date: Today

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Hedman Street Headers 69680

Headers, Street, Shorty, Steel, Temporary Paint, Cadillac, Chevy, GMC, Small Block LS, Pair

Part Number: HED-69680

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Hedman Street Headers 69726

Headers, Full-Length, Steel, Silver Ceramic Coated, Cadillac, Chevrolet, GMC, Pair

Part Number: HED-69726

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Hedman Street Headers 69683

Headers, Street, Shorty, Steel, Black Ceramic Coated, Cadillac, Chevy, GMC, Pair

Part Number: HED-69683

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

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