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Doug Thorley Tri-Y Headers

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Doug Thorley Tri-Y Headers

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. The Tri-Y configuration builds the most power in the middle rpm range, which is great for towing and 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. 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 506Y-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 506Y-C - Doug Thorley Tri-Y Headers

Headers, 4-1, One Piece, Steel, Ceramic Coated, Toyota, 2.7L, Each

(1)

Part Number: DTE-506Y-C More Detail...

Estimated Ship Date: Today

$406.97

  • 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 630Y-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 630Y-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Ceramic Coated, Jeep, 5.2L, Pair

(1)

Part Number: DTE-630Y-C More Detail...

Estimated Ship Date: Today

$793.97

  • 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 375Y-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 375Y-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Silver Ceramic Coated, Chevy, GMC, Car, Truck, Small Block, Pair

Not Yet Reviewed

Part Number: DTE-375Y-C More Detail...

Estimated Ship Date: Today

$633.97

  • 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 376Y1C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 376Y1C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Silver Ceramic Coated, Chevy, Small Block, Pair

(1)

Part Number: DTE-376Y1C More Detail...

Estimated Ship Date: Today

$626.97

  • 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 218Y-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 218Y-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Silver Ceramic Coated, Ford, Pickup, 6.8L, Kit

Not Yet Reviewed

Part Number: DTE-218Y-C More Detail...

Estimated Ship Date: Today

$726.97

  • 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 310Y-1-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 310Y-1-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Chrome, Chevy, GMC, Pickup, SUV, 4.8, 5.3L, Kit

(1)

Part Number: DTE-310Y-1-C More Detail...

Estimated Ship Date: Today

$644.97

  • 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 555Y-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 555Y-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Ceramic Coated, Toyota, Pickup, 2.4L, Each

(1)

Part Number: DTE-555Y-C More Detail...

Estimated Ship Date: Today

$427.97

  • 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 289YC - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 289YC - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Silver Ceramic Coated, Ford, Mercury, 289, 302, Pair

Not Yet Reviewed

Part Number: DTE-289YC More Detail...

Estimated Ship Date: Today

$657.97

  • 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 542Y-O-C - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 542Y-O-C - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Ceramic Coated, Toyota, 2.4L, Kit

Not Yet Reviewed

Part Number: DTE-542Y-O-C More Detail...

Estimated Ship Date: Today

$434.97

  • 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 550YC - Doug Thorley Tri-Y Headers

Click here for more information about Doug Thorley Headers 550YC - Doug Thorley Tri-Y Headers

Headers, Tri-Y, Steel, Ceramic Coated, Toyota, Pickup, 2.4L, Each

Not Yet Reviewed

Part Number: DTE-550YC More Detail...

Estimated Ship Date: Today

$436.97

  • 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.

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