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Doug Thorley

Optimize Your Exhaust with Doug Thorley

Doug Thorley Headers is a well-respected manufacturer known for its exhaust systems and headers, particularly for American muscle and classic vehicles. With a focus on enhancing engine efficiency and sound, Doug Thorley products are designed to deliver both performance gains and durability. Doug Thorley offers a wide range of headers, including long-tube and shorty designs, crafted from premium materials to optimize exhaust flow and improve horsepower and torque. The company also offers a selection of performance accessory parts, exhaust tips and gaskets, designed to complement their headers and exhaust systems for a complete performance upgrade. Shop your favorite Doug Thorley exhaust products here at CPP.

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  1. Doug Thorley Tri-Y Headers for 2008-10 Lexus Lx570

    for 2008-10 Lexus Lx570, 5.7L, 2/4Wd (With Air Injection Chevy Truck, "Race"

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    In Stock
    Part # THY-560Y2-L-C
    0%
    $981.72
  2. Doug Thorley Tri-Y Ceramic Headers for 1962-67 Chevy II, Nova M2 IFS

    1962-67 Chevy II, Nova M2 IFS

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    In Stock
    Part # THY-335Y-C
    0%
    $1,095.00
  3. Doug Thorley Tri - Y Headers for 1973-89 GM Pick Up

    1973-89 GM P/U, Suburban 366-454 2Wd Big Block V8

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    In Stock
    Part # THY-303Y-C
    0%
    $1,031.74
  4. Doug Thorley Long Tube Tri-Y Headers 2014 Silverado/Sierra

    2014 Silverado/Sierra (Race Use Only)

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    In Stock
    Part # THY-352Y-L-C
    0%
    $1,408.00
  5. Doug Thorley Ls Headers for 1955-57 Chevy Fullsize

    1955-57 Chevy Fullsize

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    In Stock
    Part # THY-358Y-C
    0%
    $1,195.00
  6. Doug Thorley Short Tube Headers for 2005-09 Toyota 4 Runner

    2005-09 Toyota 4 Runner

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    In Stock
    Part # THY-563-SS-C
    0%
    $1,284.00
  7. Doug Thorley Long Tube Header 4:1 (1-3/4" To 1-7/8") for 1967-74 Camaro

    1967-69 Camaro, LS-Series Motor Swap, 4.8L-6.2L

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    In Stock
    Part # THY-320-C
    0%
    $1,095.00
  8. Doug Thorley Long Tube Headers 3:1 Race Only

    Race Only (See More Information For App.)

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    In Stock
    Part # THY-465-L-C
    0%
    $795.00
  9. Doug Thorley Short Tube Headers for 2006-09 Impala and 2005-08 Monte Carlo SS

    2006-09 Impala and 2005-08 Monte Carlo SS

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    In Stock
    Part # THY-340-C
    0%
    $1,176.00
  10. Doug Thorley Tri-Y Headers for 1967-72 Chevy / GM Trucks with LS Engine

    1967-72 Chevy / GM Trucks with LS Engine 1-5/8" Primaries All LS (Except LS7)

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    In Stock
    Part # THY-324Y-C
    0%
    $1,095.00
  11. Long Tube Tri-Y Headers for 2009-12 Chevy/GMC Canyon

    2009-12 Chevy/GMC Canyon

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    In Stock
    Part # THY-344Y-C
    0%
    $995.00
  12. Doug Thorley Tri-Y Header for 1993-99 Jeep Grand Cherokee

    1993-99 Jeep Grand Cherokee, 5.2L-5.9L, 2/4Wd

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    In Stock
    Part # THY-630Y-C
    0%
    $1,198.93
  13. Doug Thorley Shortie Header without exterior EGR tube for 1995-04 Toyota Tacoma/4Runner/Tundra

    1995-04 Toyota Tacoma/4Runner/Tundra, 3.4L, 2/4Wd

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    In Stock
    Part # THY-507-C
    0%
    $1,195.00
  14. Doug Thorley Headers Ls Series 1-3/4" Primary Tube for 1964-67 Chevelle

    1964-67 Chevelle

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    In Stock
    Part # THY-346-C
    0%
    $995.00
  15. Doug Thorley Long Tube Headers 3:1 4-Wheel Drive (4WD)

    4Wd Only (See More Information For App.)

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    In Stock
    Part # THY-505-C
    0%
    $1,195.00
  16. Doug Thorley Shortie Header for 2002-13 GM Silverado

    2002-13 GM Silverado/Sierra, Suburban, Tahoe/Yukon, Hummer H

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    In Stock
    Part # THY-309-C
    0%
    $635.91
  17. Doug Thorley Block Hugger Headers Universal

    Universal Header Center Dump, LS Series Motors, 4.8L-6.2L

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    In Stock
    Part # THY-326-C
    0%
    $895.00
  18. Doug Thorley Shortie Header for 2005-14 Nissan Frontier

    2005-14 Nissan Frontier/Pathfinder/Xterra/Equator/Navara

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    In Stock
    Part # THY-470-L-C
    0%
    $749.00
  19. Doug Thorley Tri-Y Headers for 2007-14 Toyota Tundra

    2007-14 Toyota Tundra, 5.7L, 2/4Wd ("Race" Use Only)

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    In Stock
    Part # THY-560Y-L-C
    0%
    $1,421.00
  20. Doug Thorley Headers 4:1 3/4 for 1964-87 Chevelle/El Camino

    1964-87 Chevelle/El Camino - Small Block Chevy

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    In Stock
    Part # THY-380Y-C
    0%
    $816.00
  21. Doug Thorley Tri-Y Headers for 1961-87 Chevy Truck

    1961-87 Chevy Truck 283-400 Suburban, Blazer/Jimmy

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    In Stock
    Part # THY-300Y-C
    0%
    $1,195.00
  22. Doug Thorley Headers, Stainless Steel Headers

    05-09 Lexus GX470, 4Runner, 1 5/8th Tubes, 2.5" Collector, Off-road use Only

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    In Stock
    Part # THY-561-SS-C
    0%
    $975.00
  23. Long Tube Headers (Race Use Only) for 2013-14 Toyota Cruiser

    2013-14 Toyota Cruiser

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    In Stock
    Part # THY-518-LS-C
    0%
    $626.00
  24. 05-09 Toyota 4-Runner Tri-Y Headers

    Long Tube Stainless Steel

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    In Stock
    Part # THY-563Y-LS-C
    0%
    $1,284.00
  25. Doug Thorley Ls Headers Silver Ceramic for 1961-64 Chevy Fullsize

    1961-64 Chevy Fullsize

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    In Stock
    Part # THY-361-C
    0%
    $825.00
  26. Doug Thorley Headers Ls Series 1-3/4" Primary Tube for 1968-74 Chevelle/El Camino

    1968-74 Chevelle/El Camino

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    In Stock
    Part # THY-347-C
    0%
    $995.00
  27. Doug Thorley Tri-Y Headers for 1967-72 Chevy / GM Trucks with Small Blocks

    1967-72 Chevy / GM Trucks with Small Block Chevy "No D Ports"

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    In Stock
    Part # THY-372Y-C
    0%
    $1,032.00
  28. Doug Thorley Tri-Y Headers for 1973-87 GM Truck 1/2 Ton and 1973-91 GM Truck 3/4 & 1 Ton

    1973-87 GM Truck 1/2 Ton and 1973-91 GM Truck 3/4 & 1 Ton

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    In Stock
    Part # THY-364Y-C
    0%
    $1,195.00
  29. Doug Thorley Tri-Y Header for 1988-98 Suzuki Samurai/Geo Tracker

    1988-98 Suzuki Samurai/Geo Tracker, 1.6L (16 Valve)

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    In Stock
    Part # THY-716Y-SS
    0%
    $496.00
  30. Doug Thorley Ls Series Tri-Y Headers for 1955-60 GM Truck 3100 Series

    1955-60 GM Truck 3100 Series

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    In Stock
    Part # THY-360Y-C
    0%
    $1,095.00
  31. Doug Thorley Tri-Y Header for2012-14 Nissan Patrol

    2012-14 Nissan Patrol/Safari/Infiniti Qx56, 5.6L, 2/4Wd

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    In Stock
    Part # THY-481Y-LS-C
    0%
    $913.13
  32. Doug Thorley Tri-Y Header 2011-13 Lexus Lx570

    2011-13 Lexus Lx570, 5.7L, 2/4Wd (With O Air Injection Chevy Truck, "Race"

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    In Stock
    Part # THY-560Y3-L-C
    0%
    $803.10
  33. Doug Thorley Long Tube Headers 4:1 for 1966-74 Chevelle/El Camino

    1966-74 Chevelle/El Camino, 1967-74 Camaro & 1968-74 Nova, 396-454

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    In Stock
    Part # THY-313-C
    0%
    $916.00
  34. Doug Thorley Long Tube Headers 4:1 (2" Primary Tubes) for 1968-78 Chevelle/El Camino

    1968-78 Chevelle/El Camino, 454-502 Big Block

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    In Stock
    Part # THY-351-C
    0%
    $723.00
  35. Doug Thorley Shortie Headers, Universal

    Universal Header Rear Swept Exit, LS Series Motors except LS7

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    In Stock
    Part # THY-309-1-C
    0%
    $895.00
  36. Doug Thorley Ls Series Tri-Y Headers for 1947-54 GM Truck 3100 Series

    1947-54 GM Truck 3100 Series

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    In Stock
    Part # THY-330Y-C
    0%
    $1,095.00
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