DTH Catalogue

Performance Products

Since

1958

For over 50 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. Driven by a passion for performance and superior quality, we are committed to developing 100% American-made products that will reliably deliver maximum horsepower and torque. Doug Thorley Headers has been pushing the limits of automotive technology since we first invented the Tri-Y header in 1958, and we do it all on American soil.

As we move into a new office and manufacturing facility, we will be working to expand our product line, improve our production capabilities and continue to find new ways to give our customers maximum power and value for their dollar. Our commitment to excellence is vital to developing and maintaining long-term relationships with our customers.

Every vehicle model is unique, and our R&D team is constantly working to provide a diverse range of products and applications to meet our customers’ needs. Whether you’re hauling an RV, building up a street rod, or just looking to get a little more punch out of your Smart Car, Doug Thorley Headers has the product to maximize horsepower and torque for your application.

For more than half a century, we have operated under the principles of meticulous attention to detail and unmatched craftsmanship while our experienced staff continues to lead the way in automotive performance. We thank our customers, employees, suppliers, and friends for helping us serve the automotive aftermarket since 1958 as we look forward to continuing our trend-setting tradition for many years to come.

A History

Born from the Doug Thorley Headers legendary Tri-Y configuration, our WORX series headers unleash all the head turning, asphalt burning performance that defines the American muscle car. Each WORX Series header has been carefully tuned to extract maximum power and efficiency from either the 5.0L “Coyote” V8 found in ’11-‘12 Ford Mustangs, or the 6.2L V8 of the ’10-‘12 Chevrolet Camaro.

Dyno results have shown peak gains of more than 25 horsepower on the Mustang, and upwards of 30 for the Camaro. The Tri-Y origin of the WORX design means that it also makes plenty of power in the low and mid range while building to those huge gains near the rev-limiter, making the WORX our most powerful and versatile header yet.

WORX Series headers are 100% made in the USA from TIG welded thick wall T304 stainless steel tubing, for maximum durability. All WORX headers are designed to facilitate the easiest installation process possible. Keep you eye out for even more WORX Series header applications coming soon!

• TIG welded for durability and looks• Serious HP gains for the Mustang 5.0, and

6.2L Camaro• 100% T304 stainless steel construction• Easy installation – no welding needed! • Improves fuel economy

WorX series HeAders

1

2

The Tri-Y Header is designed with an emphasis on maximum low and mid range torque, while making ample horsepower throughout the RPM range. The 4:2:1 Tri-Y header design makes it the ideal choice for trucks, tow-rigs, RV’s and most street applications. The collector design makes this header one of our most efficient, which means you’ll see improvements both on the dyno and at the pump.

A Doug Thorley Headers original design, the 4:2:1 collector specification on the Tri-Y Header is engineered to match your engine’s firing order and thereby maximize exhaust scavenging - the complete expulsion of gasses on the exhaust stroke. The Tri-Y design creates more useable power and torque than any other header design, making it the header of choice for enthusiasts who want the most bang for their buck.

• Street legal in all 50 states (most applications)• Super tough 3/8” flanges and 14 gauge tubing• Compliant to the toughest emission standards• Maximum torque and horsepower boost• A Doug Thorley Headers original design• 100% Made in America• Durable, and beautiful, ceramic coating

tri-y HeAders

3

tri-y HeAders

Modern engine compartments are crowded spaces, and seem to be getting even more crowded with every new year. That’s why we’ve developed our Shortie Headers to provide maximum performance in a compact, easy to install package. Our Shortie Headers replace restrictive stock manifolds with thick wall steel tubing for increased exhaust flow, but retain the factory mounting locations for emissions equipment to keep you street legal.

The Shortie Header works great in applications where space is limited, and a Long-Tube or Tri-Y header just won’t fit. Easy installation, more power and better fuel economy make the Shortie a winner.

• Street legal in all 50 states (most applications)• Compact design - great for tight spaces• Tough 3/8” flanges and thick wall steel tubing• Compliant with the toughest emission standards• Super easy installation• 100% Made in America• Durable, and beautiful, ceramic coating

sHortie HeAders

4

Our Long Tube Headers replace restrictive stock exhaust manifolds with long primary tubes designed to dramatically increase the flow of exhaust gasses, and reduce power-robbing backpressure within the exhaust system. Allowing the engine to breathe more freely improves power and efficiency, making our Long Tube Headers one of the most cost-effective modifications you can make to your vehicle.

The Long Tube Header is perfect for any high-performance street or strip application. Each header is constructed from thick wall steel, and all come finished with our beautiful ceramic coating for long-lasting performance.

• Street legal in all 50 states (most applications)• Big power gains across the RPM range• Tough 3/8” flanges and thick wall tubing• Awesome for high performance street machines• 100% Made in America

LoNG tUBe

5

Eliminating restriction in the exhaust system to allow your engine to breathe freely is often the first step on the way to producing more power, and Doug Thorley Headers has over half a century of experience in doing just that. Our cat-back and turbo-back exhaust systems draw on that experience to deliver more horsepower and torque than restrictive OEM systems, and a satisfying rumble that lets others know you mean business.

We build our cat-back and turbo-back systems using tough 16-gauge tubing for extra durability, with smooth mandrel bends for maximum flow and maximum efficiency! Each of our systems utilizes our exclusive Aero-Flow mufflers that feature straight-thru perforated cores, with no power robbing baffles or chambers, to produce maximum power and that signature Doug Thorley sound.

Installation is as simple as bolting the new system up to the factory mounting

locations, and each kit includes easy to use clamps to ensure a fast and clean fit without any welding required. As a finishing touch, most systems come standard with a decorative exhaust tip featuring a laser etched Doug Thorley Headers logo. Additional show-quality tip styles are available in a number of finishes, including super durable polished T304 stainless steel.

Just like our headers, every Doug Thorley Headers exhaust system is made in the USA, and backed by our limited lifetime warranty to give you peace of mind. Pair one of our cat-back systems with one of our header systems for the ultimate in American made performance!

CAt-BACKs

terMs & CoNditioNs / WArrANtyPRICESSubject to change without notice. Doug Thorley Headers is not responsible for incorrectly printed descriptions, part numbers or pricing.

PAYMENTSMastercard, Visa, American Express, Discover accepted. Credit card orders can only be shipped to the billing address on associated with the card. International orders must be prepaid via wire transfer. Refused shipments will incur inbound and outbound freight charges.

SHIPMENT METHODAll orders ship F.O.B. Corona, CA standard method is Fedex Ground unless other method requested. Palletized truck shipment carrier is at the discretion of Doug Thorley Headers unless otherwise noted.

SHIPPING CLAIMSMissing, damaged or other claims must be handled directly through the carrier and the customer direct.

LIMITED WARRANTYDoug Thorley Headers products are under warranty against defective materials and workmanship for as long as you, the original purchaser owns the said product. Limited warranty is non transferable and proof of purchase will be required for any claim. Any NON defective, unopened, uninstalled item may be returned within seven days of receipt and may be subject to a 20% restocking fee. Bluing, discoloration and/or rust are not covered under the limited warranty and are considered normal. Wrapping headers with “Header Wrap” will void any and all warranties including the ceramic coating. Contact Doug Thorley Headers directly at (951)739-5900 to obtain an ROG number prior to return of product. Any shipping charges incurred will be the responsibility of the consumer. Authorized returns will be either repaired or replaced at Doug Thorley’s discretion. Doug Thorley Headers is not responsible for any costs incurred including labor to remove or install the defective product or any damages whether consequential, special or otherwise including injuries arising from the use of Doug Thorley Headers products.

2013 Product List

1. Part numbers that include a “Y” indicate that the header is of our Tri-Y design. Part numbers without the “Y” are a 4:1 type design of varying lengths per application.2. All part numbers noted with “-C” indicate that the header has a ceramic coated finish for maximum heat & corrosion control.3. Smog & air pump applications: Part numbers marked with a (*) are available with air injection hook-ups. To order, use the part number listed with the addition of a “-S” or “-DA”. Example: THY-300Y-C would become

THY-300Y-S-C for smog/EGR fittings, THY-303Y-C would become THY-303Y-DA-C for dual air fittings.

FORD - LINCOLN - MERCURY (tRUCk, RV, SUV, VaN appLICatIONS)YEAR ENGINE MODEL PRIMARY /

COLLECTORDRIVE HEADER

EXITCODES PART #

1988-97 460 FUEL INJ.

F-250 / F-350 , MOTORHOME - DOES NOT INCLUDE CONNECTOR PIPES

1-3/4” / 2-1/2” 2WD / 4WD DUAL 9, 18, 23, 30

THY-214Y-FI-C *

1988-92 460 FUEL INJ.

F-250 / F-350, CLASS “A” MOTORHOME - #1 CONNECTOR PIPE “OVER” TRANSMISSION CROSSMEMBER

1-3/4” / 2-1/2” 2WD / 4WD PASSENGER 9, 17, 18, 22, 23

THY-214Y-FI1-C

1988-92 460 FUEL INJ.

F-250 / F-350, CLASS “A” & “C” MOTORHOME - #2 CONNECTOR PIPE “UNDER” TRANSMISSION CROSSMEMBER

1-3/4” / 2-1/2” 2WD / 4WD PASSENGER 9, 17, 18, 22, 24

THY-214Y-FI2-C

1993 1/2-95

460 FUEL INJ.

CLASS “C” MOTORHOME - AIR INJECTION STANDARD

1-3/4” / 2-1/2” 2WD PASSENGER 9, 17,18, 22, 23

THY-214Y-FI3-C

1993 1/2-95

460 FUEL INJ.

CLASS “A” MOTORHOME - AIR INJECTION STANDARD

1-3/4” / 2-1/2” 2WD PASSENGER 9, 17,18, 22, 23

THY-214Y-FI4-C

1993 1/2-95

460 FUEL INJ.

F250 / F350 PICKUP TRUCK - AIR INJECTION STANDARD

1-3/4” / 2-1/2” 2WD / 4WD PASSENGER 9, 17,18, 22, 23

THY-214Y-FI5-C

1996-97 460 FUEL INJ.

F250 / F350 PICKUP TRUCK 1-3/4” / 2-1/2” 2WD / 4WD PASSENGER 9, 17, 18, 22, 23

THY-214Y-FI6-C

1999-04 6.8L V-10 F250 / F350 PICKUP TRUCK 1-5/8” / 2-1/2” 2WD / 4WD PASSENGER 17, 18 THY-218Y-C

1999-08 6.8L V-10 CLASS “A” MOTORHOME, F53 CHASSIS 1-5/8” / 2-1/2” 2WD PASSENGER 17, 18 THY-218Y1-C

2003-06 4.0L RANGER- SHORTIE HEADER

1-1/2” / 2-1/4” 2WD / 4WD DUAL THY-220-C

FORD - LINCOLN - MERCURY (paSSENgER CaR appLICatIONS)1970-73 351-400M MUSTANG

- 2-VALVE HEADS ONLY1-3/4" / 3" DUAL 8, 9 THY-265-2V-C

1970-74 351-400M FAIRLANE, TORINO, MONTEGO, CYCLONE (WILL NOT FIT RANCHERO) - 2-VALVE HEADS ONLY

1-3/4" / 3" DUAL 8, 9 THY-265-2V-C

1964-68 260-302W MUSTANG (WILL NOT FIT FALCON) 1-5/8” / 2-1/2” DUAL 8, 21, 29 THY-289Y-C

1966-77 260-302W MAVERICK, COMET, RANCHERO - SHORTIE HEADER

1-5/8” / 2-1/2” DUAL 9 THY-268-1-C

2011-12 5.0L COYOTE

MUSTANG, WORX SERIES HEADER - OFF-ROAD “RACE” USE ONLY, STAINLESS STEEL, INCLUDES X-PIPE

1-7/8” / 2-1/2” DUAL 1, 17 THY-291Y-WRX

gENERaL MOtORS (tRUCk, RV, SUV, VaN appLICatIONS)1961-66 283-400 PICKUP TRUCKS, SUBURBAN, BLAZER/JIMMY

- AUTOMATIC TRANSMISSION ONLY1-5/8” / 2-1/2” 2WD /

4WDDUAL 2, 9, 12,

13, 31THY-300Y-C *

1973-87 283-400 PICKUP TRUCKS, SUBURBAN, FULL-SIZE BLAZER/JIMMY - MANUAL OR AUTOMATIC TRANSMISSION

1-5/8” / 2-1/2” 2WD DUAL 2, 13, 31 THY-300Y-C *

1973-91 366-454 PICKUP TRUCKS, SUBURBAN, FULL-SIZE BLAZER/JIMMY 1-3/4” / 2-1/2” 2WD DUAL 31 THY-303Y-C *

1975-00 366-454 CLASS “A” MOTORHOME (P-30 CHASSIS ONLY) 1-3/4” / 2-1/2” 2WD DUAL 31 THY-303Y-C *

1973-91 366-454 PICKUP TRUCKS, SUBURBAN, FULL-SIZE BLAZER/JIMMY 1-3/4” / 2-1/2” 4WD DUAL 31 THY-304Y-C *

1987-94 366-454 CLASS “A” MOTORHOME w/ TURBO 400 TRANSMISSION (P-R-N-D-2-1) - 3” CATALYTIC INLET

1-3/4” / 2-1/2” 2WD DRIVER 9, 17, 22, 31 THY-306Y1-C *

1990-00 366-454 CLASS “A” MOTORHOME w/ 4L80E TRANSMISSION (P-R-N-OD-D-2-1) - 3” CATALYTIC INLET

1-3/4” / 2-1/2” 2WD DRIVER 9, 17, 22, 31 THY-306Y2-C

2002-12 4.8L-6.2L SILVERADO/SIERRA, SUBURBAN, TAHOE/YUKON, AVALANCHE, HUMMER H2, ESCALADE, DENALI - SHORTIE HEADER

1-5/8” / 2-1/2” 2WD / 4WD

DUAL 34 THY-309-C *

1999-12 4.8L-6.2L SILVERADO/SIERRA, SUBURBAN, TAHOE/YUKON, AVALANCHE, HUMMER H2, ESCALADE, DENALI - OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/2” 2WD / 4WD

PASSEN-GER

1, 17 THY-310Y-1-C

2001-11 8.1L CLASS “A” MOTORHOME / WORKHORSE CHASSIS (W-SERIES ONLY) - STAINLESS STEEL

1-3/4” / 3” 2WD DUAL 17, 18 THY-312

1961-66 4.8L-6.2L PICKUP TRUCKS, SUBURBAN (LS SERIES MOTOR SWAP) - MANUAL OR AUTOMATIC TRANSMISSION

1-3/4” / 2-1/2” 2WD / 4WD

DUAL 30, 32 THY-322Y-C


1-7/8” / 2-1/2” 2WD / 4WD



1-5/8” / 2-1/2” 2WD / 4WD


2000-12 6.0L W42 WORKHORSE CHASSIS / DELIVERY VEHICLE - CALL FOR SPECIFIC APPLICATION ASSISTANCE

1-5/8” / 3” DRIVER 17 THY-342-C

2009-12 5.3L COLORADO - OFF-ROAD “RACE” USE ONLY

1-3/4” / 2-1/2” 2WD DUAL 1, 17 THY-344Y-C

gENERaL MOtORS (tRUCk, RV, SUV, VaN appLICatIONS)

YEAR ENGINE MODEL PRIMARY / COLLECTOR

DRIVE HEADER EXIT

CODES PART #

1973-78 403-455 OLDMOBILE CLASS “A” MOTORHOME - FRONT WHEEL DRIVE ONLY

1-3/4” / 2-1/2” DUAL 17 THY-355Y-C

1967-72 283-400 PICKUP TRUCKS, SUBURBAN 1-5/8” / 2-1/2” 2WD / 4WD

DUAL 2, 12, 13, 31 THY-372Y-C

gENERaL MOtORS (paSSENgER CaR appLICatIONS)1967-74 396-454 CAMARO 1-3/4” / 3” DUAL 9, 31 THY-313-C

1966-74 396-454 CHEVELLE, EL CAMINO 1-3/4” / 3” DUAL 9, 31 THY-313-C

1968-74 396-454 NOVA 1-3/4” / 3” DUAL 9, 31 THY-313-C

4.8L-6.2L BLOCK HUGGER STYLE HEADER (LS SERIES MOTORS), STRAIGHT DOWN EXIT - NO LS7, OFF-ROAD “RACE” USE ONLY

1-3/4” / 2-1/2” DUAL 1 THY-326-C

2008-10 6.0L-6.2L PONTIAC G8 GT, G8 GXP, HOLDEN COMMODORE / CAPRICE (2008-12) - OFF-ROAD “RACE” USE ONLY

1-3/4” / 2-1/4” DUAL 1 THY-333Y-C

2010-12 6.0L-6.2L CAMARO SS, PONTIAC G8 GT (2008-10) - SHORTIE HEADER

1-3/4” / 2-1/2” DUAL THY-336-C

2010-12 6.0L-6.2L CAMARO SS (1-3/4” PRIMARY TUBES) - OFF-ROAD “RACE” USE ONLY

1-3/4” / 2-1/2” DUAL 1 THY-337Y-C

2010-11 3.6L CAMARO - SHORTIE HEADER, WELD-ON OUTLET

1-1/2” / 2-1/2” DUAL THY-338-C

2010-12 6.2L CAMARO SS (1-7/8” PRIMARY TUBES), WORX SERIES HEADER - OFF-ROAD “RACE” USE ONLY, STAINLESS STEEL

1-7/8” / 2-1/2” DUAL 1, 17 THY-339Y-WRX

2005-09 5.3L MONTE CARLO SS, IMPALA SS (2006-09) GRAND PRIX GXP (2005-08), BUICK LACROSS (2007-09)

1-3/4” / 2-1/2” 17 THY-340-C

1967-74 326-455 PONTIAC FIREBIRD, TRANS AM (PONTIAC MOTOR) - 3-TUBE HEADER, D-PORTS ONLY

1-3/4” / 3” DUAL 7, 9, 25, 29, 31

THY-341-C

1970-74 326-455 PONTIAC GRAND PRIX (PONTIAC MOTOR) - 3-TUBE HEADER, D-PORTS ONLY

1-3/4” / 3” DUAL 7, 9, 25, 29, 31

THY-341-C

1964-73 326-455 PONTIAC GTO, LEMANS (PONTIAC MOTOR) - STOCK MOTOR MOUNTS, 3-TUBE HEADER, D-PORTS ONLY

1-3/4” / 3” DUAL 7, 9, 25, 29, 31

THY-341-C

1967-74 265-400 CAMARO 1-5/8” / 2-1/2” DUAL 2, 6, 29, 31 THY-375Y-C

1968-78 265-400 CHEVELLE, EL CAMINO 1-5/8” / 2-1/2” DUAL 2, 6, 29, 31 THY-375Y-C

1968-74 265-400 NOVA 1-5/8” / 2-1/2” DUAL 2, 6, 29, 31 THY-375Y-C

1967-69 265-400 CAMARO, Z28 - NO COLUMN SHIFT, NO A/C

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 12, 29, 31

THY-376Y1-C

1968-72 265-400 NOVA - NO COLUMN SHIFT, NO A/C

1-5/8" / 2-1/2" DUAL 2, 5, 6, 9, 12, 29, 31

THY-377Y1-C

1971-94 265-400 PASSENGER CAR, WAGON - 3/4 LENGTH HEADER FOR MAX GROUND CLEARANCE

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 30, 31

THY-380-C

1967-81 265-400 CAMARO - 3/4 LENGTH HEADER FOR MAX GROUND CLEARANCE

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 30, 31

THY-380-C

1964-87 265-400 CHEVELLE, EL CAMINO - 3/4 LENGTH HEADER FOR MAX GROUND CLEARANCE

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 30, 31

THY-380-C

1970-87 265-400 MONTE CARLO - 3/4 LENGTH HEADER FOR MAX GROUND CLEARANCE

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 30, 31

THY-380-C

1968-79 265-400 NOVA - 3/4 LENGTH HEADER FOR MAX GROUND CLEARANCE

1-5/8” / 2-1/2” DUAL 2, 5, 6, 9, 30, 31

THY-380-C

DODgE1968-74 361-400 SUPER BEE, ROADRUNNER, GTX, SATELLITE, CORONET 1-3/4" / 3" DUAL THY-151-C

1968-74 361-400 CHARGER 1-3/4" / 3" DUAL 29 THY-151-C

1970-74 361-400 CHALLENGER, CUDA (ALL OTHER "B" & "E" BODIES) 1-3/4" / 3" DUAL THY-151-C

NISSaN1990-95 3.0L PICKUP TRUCK, HARD BODY, PATHFINDER

- NO LIFT KITS1-1/2" / 2-1/2" 4WD DRIVER 22 THY-464-2-C

1998-04 3.0L-3.3L FRONTIER, PATHFINDER, XTERRA - LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-1/2” / 1-3/4” 2WD / 4WD

DUAL 1 THY-465-L-C

2005-12 4.0L FRONTIER, PATHFINDER, XTERRA, EQUATOR, NAVARA - SHORTIE HEADER

1-5/8” / 2-1/4” 2WD / 4WD

DUAL THY-470-C

2005-12 4.0L FRONTIER, PATHFINDER, XTERRA, EQUATOR, NAVARA - LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-470-L-C

2012 5.6L PATROL SAFARI, INFINITI QX56 - LONG TUBE HEADER, STAINLESS STEEL, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-481Y-LS-C

2004-12 5.6L TITAN, ARMADA (OVAL PORT ONLY) - LONG TUBE HEADER, STAINLESS STEEL, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-481Y-LSO-C

1. Part numbers that include a “Y” indicate that the header is of our Tri-Y design. Part numbers without the “Y” are a 4:1 type design of varying lengths per application.2. All part numbers noted with “-C” indicate that the header has a ceramic coated finish for maximum heat & corrosion control.3. Smog & air pump applications: Part numbers marked with a (*) are available with air injection hook-ups. To order, use the part number listed with the addition of a “-S” or “-DA”. Example: THY-300Y-C would become

THY-300Y-S-C for smog/EGR fittings, THY-303Y-C would become THY-303Y-DA-C for dual air fittings.

800-347-8664 • www.dougthorleyheaders.com

tOYOtaYEAR ENGINE MODEL PRIMARY /


EXITCODES PART #

1988-95 3.0L PICKUP TRUCK, 4-RUNNER - NO COLUMN SHIFT

1-1/2” / 2-1/2” 4WD DRIVERv 17, 29 THY-505-C

1995-99 2.4L-2.7L TACOMA, 4RUNNER - 3.5” CATALYTIC FLANGE BOLT SPACING

1-1/2” / 2-1/2” 2WD / 4WD

PASSENGER 33 THY-506Y-C

1995-99 2.4L-2.7L TACOMA, 4-RUNNER - 4.25” CATALYTIC FLANGE BOLT SPACING

1-1/2” / 2-1/2” 2WD / 4WD

PASSENGER 33 THY-506Y-1-C

1995-04 3.4L TACOMA, 4RUNNER, TUNDRA - WITHOUT EXTERNAL EGR TUBE

1-1/2” / 2-1/2” 2WD / 4WD

PASSENGER 17 THY-507-C

1995-04 3.4L TACOMA, 4RUNNER, TUNDRA - WITH EXTERNAL EGR TUBE

1-1/2” / 2-1/2” 2WD / 4WD

PASSENGER 17 THY-507-S-C

2000-04 4.7L TUNDRA 1-1/2” / 2-1/2” 2WD / 4WD

DUAL THY-508-C

2005-12 2.4L-2.7L TACOMA, 4RUNNER, PRADO, HILUX - WITH AIR INJECTION

1-1/2” / 2-1/4” 2WD / 4WD

PASSENGER THY-509Y-C

2000-04 2.4L-2.7L TACOMA, 4RUNNER - SHORTIE HEADER, SINGLE OUTLET MANIFOLD WITHOUT REAR FACING EGR

1-1/2”/ 2-1/4” 2WD / 4WD

PASSENGER THY-511-C

2000-04 2.4L-2.7L TACOMA, 4RUNNER - DUAL OUTLET MANIFOLD WITH REAR FACING EGR

1-1/2”-2-1/4” 2WD / 4WD

PASSENGER THY-511Y-1-C

2005-06 4.7L TUNDRA- SHORTIE HEADER, WITH AIR INJECTION

1-5/8” / 2-1/2” 2WD / 4WD

DUAL THY-512-C

2007-11 4.7L LAND CRUISER - SHORTIE HEADER, NO AIR INJECTION, NON-USA MODELS (CALL FOR DETAILS)

1-5/8" / 2-1/2" 4WD DUAL THY-514-M-C

2005-12 4.0 FJ CRUISER, 4RUNNER, PRADO, HILUX - SHORTIE HEADER, WELD-ON OUTLET

1-1/2” / 2-1/4” 2WD / 4WD

DUAL THY-515-1-C

2005-11 4.0 TACOMA - SHORTIE HEADER, WELD-ON OUTLET

1-1/2” / 2-1/4” 2WD / 4WD

DUAL THY-515-1-C

2005-12 4.0 FJ CRUISER, 4RUNNER, PRADO, HILUX- LONG TUBE HEADER, STAINLESS STEEL, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-515-LS-C

2005-11 4.0 TACOMA - LONG TUBE HEADER, STAINLESS STEEL, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-515-LS-C

2009-12 4.0 LAND CRUISER - LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-516-L-C

2012 4.0 TACOMA - SHORTIE HEADER, WITH AIR INJECTION, WELD-ON OUTLET

1-5/8” / 2-1/4” 2WD / 4WD

DUAL THY-517-C

2012 4.0 TACOMA (WITH AIR INJECTION) - LONG TUBE HEADER, STAINLESS STEEL, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/4” 2WD / 4WD

DUAL 1 THY-517-LS-C

1981-87 20/22R-RE PICKUP TRUCK, 4RUNNER - NO O2 SENSOR, NO AIR INJECTION

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22, 29 THY-542Y-C

1981-87 20/22R-RE PICKUP TRUCK, 4RUNNER - O2 SENSOR IN MANIFOLD, NO AIR INJECTION

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22, 29 THY-542Y-O-C

1981-87 20/22R-RE PICKUP TRUCK, 4RUNNER - VERTICAL AIR INJECTION, NO OS SENSOR

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22, 29 THY-542Y-S-C

1981-87 20-22R-RE PICKUP TRUCK, 4RUNNER - VERTICAL AIR INJECTION, O2 SENSOR IN MANIFOLD

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22, 29 THY-542Y-SO-C

1981-95 20/22R-RE PICKUP TRUCK, 4RUNNER - SIDE FEED AIR INJECTION OR BLOCK OFF PLATES, O2 SENSOR IN MANIFOLD

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22 THY-550Y-C

1981-95 20/22R-RE PICKUP TRUCK, 4RUNNER - SIDE FEED AIR INJECTION OR BLOCK OFF PLATES, O2 SENSOR NEAR CATALYTIC

1-1/2” / 2-1/4” 2WD / 4WD

DRIVER 3, 22 THY-555Y-C

2007-12 5.7L TUNDRA, LAND CRUISER 1-5/8” / 2-1/2” 2WD / 4WD

DUAL THY-560Y-C

2007-12 5.7L TUNDRA - LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/2” 2WD / 4WD

DUAL 1 THY-560Y-L-C

2007-12 5.7L LAND CRUISER - LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/2” 2WD / 4WD

DUAL 1 THY-560Y1-L-C

2008-10 5.7L LEXUS LX570 - WITH AIR INJECTION, LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/2” 2WD / 4WD

DUAL 1, 35 THY-560Y2-L-C

2011-12 5.7L LEXUS LX570 - WITHOUT AIR INJECTION, LONG TUBE HEADER, OFF-ROAD “RACE” USE ONLY

1-5/8” / 2-1/2” 2WD / 4WD

DUAL 1, 35 THY-560Y3-L-C

1999-2004

4.7L LAND CRUISER 100 SERIES W/O VVTI - SHORTIE HEADER, STAINLESS STEEL

1-5/8” / 2-1/4” 2WD / 4WD

DUAL THY-561-SS-C

2005-07 4.7L LAND CRUISER 100 SERIES WITH VVTI - SHORTIE HEADER, WITH AIR INJECTION, STAINLESS STEEL

1-5/8” / 2-1/4” 2WD / 4WD

DUAL THY-562-SS-C

JEEpYEAR ENGINE MODEL PRIMARY /


EXITCODES PART #

1972-79 304-401 JEEP WAGONEER, CHEROKEE, J-SERIES TRUCK 1-5/8” / 2-1/2” 2WD / 4WD PASSENGER 17, 22, 35 THY-616Y-C *

1980-91 304-401 JEEP WAGONEER, J-SERIES TRUCK 1-5/8” / 2-1/2” 2WD / 4WD PASSENGER 17 THY-616Y2-C

1993-99 5.2L-5.9L JEEP GRAND CHEROKEE 1-5/8” / 2-1/2” 2WD / 4WD PASSENGER 17, 18, 22 THY-630Y-C

1991-99 4.0L JEEP WRANGLER YJ, CHEROKEE, GRAND CHEROKEE - STAINLESS STEEL

1-5/8” / 2-3/4” 2WD / 4WD DRIVER HDX-634Y

2000-06 4.0L JEEP WRANGLER TJ, CHEROKEE, GRAND CHEROKEE - SHORTIE HEADER, DUAL CATALYTIC CONVERTORS, STAINLESS STEEL

1-5/8” / 2” 2WD / 4WD DRIVER HDX-635-C

2007-11 3.8L JEEP WRANGLER JK - SHORTIE HEADER, STAINLESS STEEL

1-1/2” / 2-1/2” 2WD / 4WD DUAL THY-636-SS

SUZUkI1984-95 1.3L/1.6L SUZUKI SAMURAI

- 8V ONLY1-1/2” / 2-1/4” 2WD/4WD DRIVER THY-700Y-SS

1988-98 1.3L/1.6L SUZUKI SAMURAI, GEO TRACKER - 16V ONLY

1-1/2” / 2-1/2” 2WD/4WD DRIVER THY-716Y-SS

SaNDRaIL4.8L-6.2L SANDRAIL (LS SERIES MOTORS), STRAIGHT BACK EXIT

- OFF-ROAD “RACE” USE ONLY, LONG TUBE 4:1 HEADER w/ RESONATORS1-3/4” / 3” DUAL 1 THY-325-C

4.8L-6.2L SANDRAIL (LS SERIES MOTORS), STRAIGHT BACK EXIT - OFF-ROAD “RACE” USE ONLY, MID-LENGTH 4:1 HEADER

1-3/4” / 3” DUAL 1 THY-328-C

EXHaUSt SYStEMS2005-12 4.0L NISSAN FRONTIER

- CAT-BACK EXHAUST WITH “Y PIPE”2-1/2” / 2-1/4” 2WD/ 4WD PASSENGER 83205

2005-12 4.0L NISSAN XTERRA - CAT-BACK EXHAUST WITH “Y PIPE”

2-1/2” / 2-1/4” 2WD/ 4WD PASSENGER 83206

2005-12 4.0 NISSAN FRONTIER, XTERRA, PATHFINDER, NAVARA - PERFORMANCE “B” PIPES

2-1/4” 2WD/ 4WD 1 83206-B

2010-12 1.6L NISSAN JUKE FWD TURBO - AXLE-BACK EXHAUST, STAINLESS STEEL

2-1/2” DRIVER 83207

2011-12 5.6L NISSAN PATROL SAFARI, INFINITI QX56 - PERFORMANCE CAT DELETE PIPES WITH RESONATORS

2-1/2” 2WD/ 4WD 1 83208

2010-11 2.0L KIA SOUL - AXLE-BACK EXHAUST, STAINLESS STEEL

2-1/4” PASSENGER 83410

2010-12 3.6L-6.2L CHEVY CAMARO V6 / SS - CAT-BACK EXHAUST WITH “X” PIPE, STAINLESS STEEL

2-1/2” DUAL REAR 85423

2010-12 3.6L-6.2L CHEVY CAMARO V6 / SS - MUFFLER DELETE SYSTEM, STAINLESS STEEL

2-1/2” DUAL REAR 85424

2011-12 1.8L CHEVY CRUZE - AXLE-BACK EXHAUST, STAINLESS STEEL

2-1/4” DRIVER 85425

2011-12 5.0L FORD MUSTANG GT - MUFFLER DELETE SYSTEM, STAINLESS STEEL

3” DUAL REAR 86416

2005-12 4.0L TOYOTA TACOMA - PERFORMANCE “Y” PIPE WITH RESONATORS, OFF-ROAD “RACE” USE ONLY

2-1/4” 2WD/ 4WD 1 89227

2007-12 4.0L TOYOTA FJ CRUISER - PERFORMANCE “Y” PIPE WITH RESONATORS, OFF-ROAD ‘RACE” USE ONLY

2-1/4” 2WD/ 4WD 1 89228

2007-09 5.7L TOYOTA TUNDRA - PERFORMANCE CAT DELETE PIPES WITH RESONATORS, OFF-ROAD “RACE” USE ONLY

2-1/2” 2WD/ 4WD 1 89234

2009-12 5.7L LEXUS LX570 - PERFORMANCE CAT DELETE PIPES WITH RESONATORS, OFF-ROAD “RACE” USE ONLY

2-1/2" 4WD 1 89246

1999-05 4.7L TOYOTA LAND CRUISER, LEXUS LX470 - CAT-BACK EXHAUST, 100-SERIES, STAINLESS STEEL

2-1/2” / 2-1/4” 2WD/ 4WD PASSENGER 89248

1 Not legal for use in California on pollution controlled motor vehicles2 Willfitangleplugcylinderheads3 Manualtransmissiononly5 Willnotfitwith“factory”airconditioning,aftermarketunitsokay6 Willnotfitpowerglidetransmission7 Somelatemodelsmayrequiredrillingandtappingendholesinhead8 Vehicleswithexternalpowersteeringslavecylindersmayrequirebracket9 Automatictransmissiononly12 Mayrequirealternator/generatorbracket13 Mayrequireairconditionbracket17 HeadercomesequippedwithconnectorpipeorY-Pipeassembly18 HeaderequippedwithEGRfittingsasstandard21 Forusewithstandardstarteronly22 Forlegalityundercarbregulations,theconnector/Y-Pipeassemblymustbeusedonvehicles

originallyequippedwithcatalyticconvertor

23 For use with E40D (overdrive) automatic transmission24 For use with C6 automatic transmission, or manual transmission25 Three-tubeheaders(centertwoportscombined)29 Willnotfitwithsteeringcolumnshift30 Headerdoesnotcomewithconnector/Y-Pipeassembly(professionalinstallationrequired)31 NoD-portcylinderheads(allGM)32 Nomechanicalclutchlinkageonmanualtransmission,mustbecableorhydraulic33 CarbE.O.Exemptionexcludeslowemissionenginefamilies,andarenotlegalonthesevehicles

designatedbymotorcodesasfollows:1997=VTY2.71JG2GK,1998=WTYXT02.7DXH,1999=XTYXT02.7DXJ

34 CarbE.O.Exemptionexcludeslowemissionenginefamilies,andarenotlegalonthesevehiclesdesignatedbymotorcodesasfollows:2004-06=4GMXT05.3178,4GMXT06.0187,5GMXT06.0187, 5GMXT05.3178, 5GMXT06.0199, 6GMXT05.3378, 6GMXT06.0387, 6GMXT06.2390, 6GMXT06.0199

35 Specialorderonly,maycausedelayinavailability

803 E. Parkridge Ave., Corona, CA 92879Toll Free: (800) 347-8664

General Info: (951) 739-5900Fax: (951) 273-3615

Email: [email protected]: www.dougthorleyheaders.com

DTH Catalogue

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