Doug Thorley Headers Parts and Accessories

The same way Summit Racing offers more than just racing parts, Doug Thorley Headers makes much more than just headers. Doug Thorley manufactures a full line of exhaust...

The same way Summit Racing offers more than just racing parts, Doug Thorley Headers makes much more than just headers. Doug Thorley manufactures a full line of exhaust products, including complete exhaust systems, free-flowing Y-pipes, tailpipes, and much more. And yes, you’ll find legendary Thorley headers, too. We’ve got full-length, tri-Y, block hugger, and shorty headers to meet your torque and power needs. Unleash the beast under your hood—shop Doug Thorley Headers exhaust parts at Summit Racing today!

Individual Parts

Part Groups

Results 1 - 25 of 60

Doug Thorley Headers THY-561-SS-C

Headers, Shorty, Stainless Steel, Silver Ceramic Coated, Toyota, Pair

Part Number: DTE-561-SS-C

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Sep 15, 2025 if ordered today

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Estimated Ship Date: Sep 15, 2025 if ordered today

Doug Thorley Headers THY-563-SS-C

Headers, Shortie, Toyota, Stainless, Ceramic Coated, Pair

Part Number: DTE-563-SS-C

Not Yet Reviewed

Estimated Ship Date: Sep 15, 2025 if ordered today

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Estimated Ship Date: Sep 15, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9005-2

Collector Gaskets, Graphite Coated Steel Core Laminate, 3-hole, 2.5 in. I.D., Pair

Part Number: DTE-9005-2

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Doug Thorley Headers THY-511-C

Exhaust Header; 4:1 Header; Ceramic Coating; Tube Size 1.5 in.; Collector Size 2.5 in.; Passenger Exit

Part Number: DTE-511C

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

Doug Thorley Headers Exhaust Flange Gaskets THY-9013-2

Exhaust Flange Gasket, Flat Gasket, Graphite Coated Steel Core, 2.50 in. O.D., Pair

Part Number: DTE-9013-2

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Doug Thorley Headers THY-465-L-C

Headers, Long Tube, Steel, Silver Ceramic Coated, 1.50 in. Tubes, 2.25 in. Collector, Nissan, Pair

Part Number: DTE-465-L-C

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Doug Thorley Headers Collector Gaskets THY-9012

Collector Gaskets, Graphite Coated Steel Core Laminate, 3-Hole, 2.25 in. Inside Diameter, Each

Part Number: DTE-9012

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Doug Thorley Headers THY-505-C

Headers, Long Tube, Steel, Ceramic Coated, Toyota, 3.0L, Kit

Part Number: DTE-505C

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

Doug Thorley Headers Headers THY-564-SS-C

2003-04 TOYOTA 4RUNNER, 4.7L, 2/4WD (T304 STAINLESS & CERAMIC COATED)

Part Number: DTE-564-SS-C

Not Yet Reviewed

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

Doug Thorley Exhaust Header Gaskets for 1975-1980 CELICA, CORONA, PICKUP - THY-9542

Exhaust Gasket, Header, 1,200 Degree Temperature, Toyota, 20R/22R, Each

Part Number: DTE-9542

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Sep 15, 2025 if ordered today

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Estimated Ship Date: Sep 15, 2025 if ordered today

Doug Thorley Headers THY-470-L-C

Exhaust Header, 4-1, 1-Piece, Steel, Ceramic Coated, for Nissan, 4.0L, Pair

Part Number: DTE-470-L-C

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

Doug Thorley Exhaust Systems for 1998-2007 LAND CRUISER, LX470 - 89248

Exhaust System, Cat-Back, Stainless Steel, Natural, Rear Exit, Lexus, Toyota, Kit

Part Number: DTE-89248

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Doug Thorley Tri-Y Headers THY-214Y-FI4-C

Headers, Tri-Y, Steel, Silver Ceramic Coated, Ford, Class A Motor Home, 429, 460, Kit

Part Number: DTE-214Y-FI4-C

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Aug 18, 2025 if ordered today

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Estimated Ship Date: Aug 18, 2025 if ordered today

Doug Thorley Headers THY-268-1-C

Headers, Shorty, Steel, Silver Ceramic Coated, Ford, Mercury, Passenger Car, 302, Pair

Part Number: DTE-2681-C

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Aug 18, 2025 if ordered today

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Estimated Ship Date: Aug 18, 2025 if ordered today

Doug Thorley Headers Headers THY-184Y1-L-C

2013-17 DODGE RAM TRUCK / "RACE" ONLY, NO CATS, Y-PIPE INCLUDED (2WD)

Part Number: DTE-184Y1-L-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-214Y-FI-C

Exhaust Header

Part Number: DTE-214Y-FI-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-214Y-FI-S-C

Exhaust Header

Part Number: DTE-214Y-FI-S-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-507-S-C

Exhaust Header

Part Number: DTE-507-S-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-508-C

Exhaust Header

Part Number: DTE-508-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-512-C

Exhaust Header

Part Number: DTE-512-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-517-C

SHORTIE HEADERS

Part Number: DTE-517-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-517-LS-C

3:1 LONG TUBE HEADERS

Part Number: DTE-517-LS-C

Not Yet Reviewed

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Doug Thorley Headers Headers THY-637Y-C

TRI Y HEADERS

Part Number: DTE-637Y-C

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Headers THY-700Y-SS

STAINLESS STEEL HEADER

Part Number: DTE-700Y-SS

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9002

2-BOLT FLANGE GASKET

Part Number: DTE-9002

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

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Estimated Ship Date: Sep 10, 2025 if ordered today

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