2015-2023
2010-2014
2005-2009
1999-2004
1994-1998
1979-1993
Installation Time
(approx) 6 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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American Racing Headers 1-7/8-Inch Catted Long Tube Headers with X-Pipe (15-20 Mustang GT350)Find parts that fit my vehicle
Item 404166
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$3,007.53 kit
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Dramatic Increase in Horsepower and Torque
- Improves Sound Volume and Tone
- Long Tube Headers
- Includes ARH 200 Cell Metallic Substrate Catalytic Converters
- Includes X-Pipe
- 1-7/8 inch Primaries with 3 inch Merge Collector with Welded Scavenging Spike
- 304 Stainless Steel Construction
- Intended for Track and Off-Road
- Computer Retune Required for Operation
- Fits 2015 to 2020 Ford Mustang GT350 Models
| Brand | American Racing Headers |
| Header Type | Headers & Mid-Pipe Kit |
| Header Primary Size | 1.76-2.00 Inch |
| Header Collector Size | 3.00 Inch |
| Header Finish | Raw |
Description
Designed for Performance. These American Racing Headers 1-7/8 in. Long Tube Catted Headers with X-Pipe are designed to push your GT350 to its limits. It features large, 1-7/8 in. primaries with optimized tube routings to ensure maximum exhaust flow for increased horsepower and torque output. The 3 in. merge collector also has a welded scavenging spike to further improve performance.
Improves Sound Volume and Tone. ARH fine-tuned these headers to produce a free-flowing, high-velocity exhaust flow. This lets it generate a noticeable increase in tone and volume.
High-Performance Catalytic Converters. ARH makes exceptional exhaust system components and these catalytic converters are no exception. These cats are highly efficient and also extremely durable.
Made in the USA! American Racing Headers fabricated these headers from components all made in the USA. They’re made from precision-cut 304 Stainless Steel and crafted by master fabricators.
No Tune Required. These headers are the result of years of research and testing and made specifically for the application so no computer re-tune is required. However, a re-tune is recommended to ensure the best possible performance.
Not CARB Certified. These ARH long tube headers are not CARB certified and are intended for off-road and track use only. They are not recommended for use on public streets and highways.
Application. These American Racing Headers 1-7/8 in. Long Tube Catted Headers with X-Pipe are specifically designed for 2015 to 2020 Ford Mustang GT350 models.
Fitment:
- 2015 Ford Mustang
- 2016 Ford Mustang
- 2017 Ford Mustang
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
American Racing Headers MTSH3-16178300LSWC
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (2) Long Tube Headers with Catalytic Converters
- (1) X-Pipe
- Installation Hardware
4.9
Reviews of American Racing Headers Exhaust Products (68)
Reviews of American Racing Headers Exhaust products have an average rating of 4.9 out of 5
Mar 27, 2023
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers with X-Pipe; Long System (15-17 Mustang GT)
2019 GT - ajafox
Best headers I've installed
Much like everyone else I wanted the best performance, fitment and value. I've looked at and installed other headers on coyotes before. The long system just made it an easy choice with an excellent warranty and MADE IN THE USA!!! the packaging is so meticulous you get the impression they really care about their products. The wall thickness and build / weld quality is top notch. Installation even on jackstands in my garage wasn't as difficult as others due to the superior fitment. The mid pipe and extentions slid to gather with precision no out of round tubing. Clamps are all of high quality ?? 10/10 recommended. The slightly extra cost is worth it!!! Oh! And the sound they make? Amazing relalt let that coyote breathe! Nice bump in power.
Aug 23, 2022
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers; Direct Connection (15-17 Mustang GT)
2017 GT - CScott
Catted ARH Long Tubes
These headers really woke up my car. I’m running them with the Ford Performance x-pipe and Roush axle back and it sounds amazing. It’s really loud under acceleration and on cold start, but still tame at idle and when cruising. Had shop install and they said it was a straightforward install with no issues. Definitely money well spent.
Feb 7, 2022
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers; Direct Connection (15-17 Mustang GT)
2015 GT - WillyG.
Long tobe headers
Well I did a lot of back and forth on what was the best and what I could afford and these made the cut..I mean if there good enough for Sdedas Silver Bulet there good enough for me..
May 10, 2021
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers (15-17 Mustang GT w/ Corsa Cat-Back)
2017 GT - JeremiahP.
ARH catted long tubes
Woke my car up! Sounds amazing paired with hpipe and corsa
Oct 6, 2020
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers; Direct Connection (15-17 Mustang GT)
2016 GT - Darkman63
Jr
I ordered these headers it took weeks yo get damn COVID lol but they are installed now and they are great the sound with the MBRP race catback my mechanic said the install was great
Mar 25, 2020
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers; Direct Connection (15-17 Mustang GT)
2017 GT - Bob519
Best headers in the game
Very high quality and increase power for my mustang gt. Highly recommended product.
Oct 23, 2019
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers (15-17 Mustang GT w/ Corsa Cat-Back)
2017 GT - JhosanR
Long tube headers
Great product! Felt the difference it’s worth the money.
Jun 1, 2019
Review shared from American Racing Headers 1-7/8-Inch Catted Long Tube Headers (15-17 Mustang GT w/ Corsa Cat-Back)
2015 GT - Edrees
Loud!!!!!!!
Got the corsa extreme catback with these headers and you will be heard from a mile away.
Apr 10, 2019
Review shared from American Racing Headers Pure Thunder Axle-Back Exhaust (15-17 GT Fastback)
2017 GT - RobertA
Quality Sound
I went from a Straight pipe muffler (loud) to a corsa extreme (make the birds singing on the trees deaf loud) to this American racing axle back exhaust. This is the quietest out of the three by a margin, but definitely the most high quality sound. I paired it with headers and that made it the perfect amount of loud without being too extra. The best way to describe it, it sounds EXOTIC definitely much different than most of the setups on the market. Sounds very Aston Martin v8 like. Trust me having the loudest car out there works to get thumbs up from the guys at your local car meet. But having a nice pitch and quality sound coming out your beast will get the ladies loving your car much more. I can’t stress that last statement enough... trust me
Mar 27, 2019
Review shared from American Racing Headers 1-7/8 x 3-Inch Catted Long Tube Headers with X-Pipe; Bottle-Neck Eliminator (15-17 Mustang GT)
2016 GT - Amrit
AMAZING
Got these headers installed along with my roush mufflers and it SCREAMS when you want it to, :)
Questions & Answers
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Will It Fit My Mustang
- GT350 - 15, 16, 17, 18, 19, 20
- GT350R - 15, 16, 17, 18, 19, 20
