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

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Results 1 - 25 of 57

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: Today

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Estimated Ship Date: 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 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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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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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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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: Nov 6, 2025 if ordered today

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Estimated Ship Date: Nov 6, 2025 if ordered 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: Nov 6, 2025 if ordered today

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Estimated Ship Date: Nov 6, 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: Nov 6, 2025 if ordered today

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Estimated Ship Date: Nov 6, 2025 if ordered today

Doug Thorley Headers Headers THY-361-C

Exhaust Header

Part Number: DTE-THY-361-C

Not Yet Reviewed

Estimated Ship Date: Nov 7, 2025 if ordered today

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Estimated Ship Date: Nov 7, 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: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9008

GASKET FLANGE

Part Number: DTE-9008

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9009

CATALYTIC FLANGE GASKET

Part Number: DTE-9009

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9010

CATALYTIC FLANGE GASKET

Part Number: DTE-9010

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Exhaust Header Gaskets THY-9015

GASKET

Part Number: DTE-9015

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9016

CATALYTIC FLANGE GASKET

Part Number: DTE-9016

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9218-3

CATALYTIC FLANGE GASKET, FORD 6.8L V-10

Part Number: DTE-9218-3

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Headers Collector Gaskets THY-9353-2

COLLECTOR FLANGE GASKET, 2014-15 GM TRUCK / SUV, DRIVER & PASSENGER SIDE (SET OF 2)

Part Number: DTE-9353-2

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Doug Thorley Exhaust Header Gaskets THY-9105-2