Doug Thorley Headers

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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 505C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 505C - Doug Thorley Headers

Headers, Full Length, Steel, Ceramic Coated, Toyota, 3.0L, Kit

Not Yet Reviewed

Part Number: DTE-505C More Detail...

Estimated Ship Date: Today

$633.97

  • Oversize

    The part DTE-505C will have additional shipping charges due to its size. These charges will be shown in the shopping cart and checkout.

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: Today

$642.97

  • Oversize

    The part DTE-324Y-C will have additional shipping charges due to its size. These charges will be shown in the shopping cart and checkout.

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

(3)

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

Estimated Ship Date: Today

$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 515-LS-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 515-LS-C - Doug Thorley Headers

Headers, Full-Length, Steel, Ceramic Coated, Toyota, SUV, Pickup, 4.0L, Pair

Not Yet Reviewed

Part Number: DTE-515-LS-C More Detail...

Estimated Ship Date: Today

$537.97

  • 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 341C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 341C - Doug Thorley Headers

Headers, Full-Length, Steel, Silver Ceramic Coated, Pontiac V8, Pair

Not Yet Reviewed

Part Number: DTE-341C More Detail...

Estimated Ship Date: Today

$614.97

  • Oversize

    The part DTE-341C will have additional shipping charges due to its size. These charges will be shown in the shopping cart and checkout.

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: Today

$636.97

  • Oversize

    The part DTE-323Y-C will have additional shipping charges due to its size. These charges will be shown in the shopping cart and checkout.

Doug Thorley Headers 2681-C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 2681-C - Doug Thorley Headers

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

Not Yet Reviewed

Part Number: DTE-2681-C More Detail...

Estimated Ship Date: Today

$479.97

  • 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: Tomorrow

$556.97

  • Drop Ship

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

  • Oversize

    The part DTE-380-C will have additional shipping charges due to its size. These charges will be shown in the shopping cart and checkout.

Doug Thorley Headers HDX-635 - Doug Thorley Headers

Click here for more information about Doug Thorley Headers HDX-635 - Doug Thorley Headers

Headers, 4-1, 1-Piece, Steel, Chrome, 1.5 in. Primary Tubes, Jeep, 4.0L, Each

Not Yet Reviewed

Part Number: DTE-HDX-635 More Detail...

Estimated Ship Date: Today

$539.97

  • 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 511C - Doug Thorley Headers

Click here for more information about Doug Thorley Headers 511C - Doug Thorley Headers

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

Not Yet Reviewed

Part Number: DTE-511C More Detail...

Estimated Ship Date: Today

$307.97

  • 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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