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Doug Thorley Headers

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The Ultimate Gift for Gearheads!
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Doug Thorley Headers

Backed by 40-plus years of knowledge and experience, Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. Their design configuration builds the most power across the rpm range, which is great for everything from street/strip performance, to towing, to steep grades. To make these headers last, Thorley made them out of durable 14-gauge mild steel with 3/8 in. thick flanges and 5/16 in. collector rings and topped them off with a good looking, nickel chrome plated finish. To prevent leaks, these headers have an O-ring welded into the flange, in addition to the high-temperature gasket provided. Unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer. This includes components like cylinder heads, chassis, steering, motor mounts, body mounts and bushings, etc. If your vehicle is using aftermarket components, parts from other applications, or custom altered parts, then it is the installer's responsibility to verify fitment.

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Doug Thorley Headers 324Y-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 324Y-C - Doug Thorley Headers

Exhaust Header; Tri-Y Header; Silver Ceramic Coating; For Use w/GM LS1 Swap; C10 w/ CCP Mounts

(1)

Part Number: DTE-324Y-C More Detail...

Estimated Ship Date: Tomorrow

$642.97

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 309-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 309-C - Doug Thorley Headers

Headers, Shorty, Steel, Ceramic Coated, Chevy, GMC, Pickup, SUV, 4.8, 5.3L, Pair

(4)

Part Number: DTE-309-C More Detail...

Estimated Ship Date: Tomorrow

$508.97

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 323Y-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 323Y-C - Doug Thorley Headers

Headers, Tri-Y, Steel, Silver Ceramic Coated, 3.00 in. Collector, Engine Swap, Chevy Small Block LS, Pair

(2)

Part Number: DTE-323Y-C More Detail...

Estimated Ship Date: Tomorrow

$636.97

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 344Y-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 344Y-C - Doug Thorley Headers

Headers, Full-length, Steel, Silver Ceramic Coated, 2.50 in. Collector, Chevy, GMC, 5.3L LS, Pair

Not Yet Reviewed

Part Number: DTE-344Y-C More Detail...

Estimated Ship Date: Tomorrow

$677.97

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 380-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 380-C - Doug Thorley Headers

Headers, Mid-Length, Steel, Ceramic Coated, Chevy, Small Block, Pair

Not Yet Reviewed

Part Number: DTE-380-C More Detail...

Estimated Ship Date: 1/19/2015 (if ordered today)

$556.97

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 313-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 313-C - Doug Thorley Headers

Headers, 4-1, 1-Piece, Steel, Silver Ceramic Coated, Chevy, GMC, 396, 402, 427, 454, Pair

Not Yet Reviewed

Part Number: DTE-313-C More Detail...

Estimated Ship Date: Monday 12/29/2014 (if ordered today)

$601.97

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 338-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 338-C - Doug Thorley Headers

Headers, Shorty, Steel, Polished Ceramic Coated, Chevy, 3.6L, Pair

Not Yet Reviewed

Part Number: DTE-338-C More Detail...

Estimated Ship Date: Monday 12/29/2014 (if ordered today)

$355.97

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 312 - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 312 - Doug Thorley Headers

Headers, 4-1, 1-Piece, Stainless Steel, Chrome, Chevy, Class A Motor Home, 8.1L, V8, Pair

Not Yet Reviewed

Part Number: DTE-312 More Detail...

Estimated Ship Date: Monday 12/29/2014 (if ordered today)

$789.97

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

Doug Thorley Headers 336-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 336-C - Doug Thorley Headers

Headers, Shorty, Tri-Y, Steel, Ceramic Coated, Chevy, Pontiac, 6.2L, V8, Pair

Not Yet Reviewed

Part Number: DTE-336-C More Detail...

Estimated Ship Date: Monday 12/29/2014 (if ordered today)

$589.97

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

  • Free Shipping

    Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

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