Name: Doug Thorley Headers® THY-542Y-O-C - Steel Long Tube 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipes
Brand: Doug Thorley Headers
SKU: mpn3513651756
Price: 643.05 USD
Availability: OutOfStock
Rating: 5 (1 reviews)

Vehicle Fitment

Make	Model	Year
Toyota	4Runner	1985-1995

Product Details

Steel Long Tube 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipes (THY-542Y-O-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.25". Header Style: Long Tube. This complete header kit makes noticeable increases in the power output of your 22R motor. Tri-Y (or 4 into 2 into 1) style headers by design will increase the power of your motor across the widest RPM band possible. That is the beauty of the design and that is why they are the best street header available! This kit includes a ceramic coated long tube tri-y header and a set of connector pipes that route exhaust gases all the way to your exhaust system. Install these tri-y headers today and get the most out of your motor! Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is the beauty of the design, and that is why they are the best street header available.

Specifications

Header Material: Steel

Header Style: Long Tube

Primary Diameter: 1.5"

Collector Diameter: 2.25"

Header Style: 4:2:1 Long-Tube Tri-Y Header

Material: Steel

Finish: Silver Ceramic Coated

Weld Up: No

Primary Tube Diameter: 1-1/2"

Primary Tube Gauge: 14 Gauge

Collector Attachment: 3 Bolt Flange

Collector Diameter: 2-1/4"

Tuned: No

Flange Thickness: 3/8"

Bolts and/or Studs Included: Yes

Gaskets Included: Yes

Connector Pipe Included: Yes

Connector Pipe Inlet Diameter: 2-1/4"

Connector Pipe Outlet Diameter: 2-1/4"

Catalytic Converter(s) Included: No

Quantity: Sold as a Complete Kit

Warranty: Limited Lifetime to original purchaser

Features

High quality at an affordable price
Expertly made from premium materials
Built to match your exact requirements

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 Doug's 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 usable power and torque than any other header design, making it the header of choice for enthusiasts who want the most bang for their buck.

For over 50 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. Driven by a passion for performance and superior quality, they 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 they first invented the Tri-Y header in 1958, and they do it all on American soil.

Brand:

Doug Thorley Headers

Part Number:

THY-542Y-O-C

UPC:

812721020928

Alternate MPN:

THY542YOC

Warranty

Doug Thorley Headers

Limited Lifetime Warranty

Unless otherwise specified, Doug Thorley Headers (hereinafter DTH) header products are warranted against defective materials and workmanship for as long as you, the original consumer purchaser, owns said header product. DTH exhaust products, defined as any component “downstream” of a DTH header product or OE factory exhaust manifolds, are warranted against defective materials and workmanship for a period of 5 years from the original consumer purchase date. These limited warranties are offered solely to the original purchaser, are non-transferrable and proof of purchase is required for any warranty claims. These warranties shall be limited to the repair, adjustment, and/or replacement of defective parts at the discretion of DTH. Authorized product(s) returned will be repaired or replaced also at the discretion of DTH. All warranties become void if any product shows evidence of any modification done without the express consent of DTH, and includes mishandling, bending, welding, mutilation of parts, and insulating wrap products. Nor shall DTH be responsible for any damages, whether consequential, special, contingent or otherwise; or expenses or injury that may arise from the use of DTH products. The bluing and discoloration of chrome exhaust products is considered normal, as is the dulling of ceramic coated products, and as such, coatings are not covered under the terms of the warranty. Environmental exposure and rust apparent during the extended life of products is also considered normal and excluded from the warranty. Any DTH product that has been discontinued from new sales for a period of 5 years or longer will no longer be eligible for replacement under terms of the warranty, the repair of any defective parts will be the only option. This warranty policy supersedes any other warranties offered by DTH. DTH reserves the right to modify the warranty policy at any time, and a detailed copy of sale terms, condition and warranty information is available upon request.

Magnuson-Moss Warranty Act:

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Reviews

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Doug Thorley Headers® THY-542Y-O-C - Steel Long Tube 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipes

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5 of 5

Best Headers There is!

Doug Thorley Headers® - Steel Long Tube Exhaust Header Kit

I own a 1993 Toyota Forerunner SR5 & it has these Awesome Performing Headers & the results are exactly as described & the price is well worth the performance I am getting. My SR5 is well built with body off frame & all brachets removed & ground down to a frame dipping & whole different drive train all new & new brakes, brackets ect...no leaf springs anymore & to much to list here but is very nice & very fast with a nice lift. So adding these headers at the cost it took is a great final finish to a Awesome SR5. Thank's for creating the best I can find, they work & they work great with an Awesome sound!

Posted by Michael / May 20, 20231993 Toyota 4Runner

Questions and Answers

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