ARH 1-3/4" x 3" Long Tube Headers (w/ Cats) for RHD Mustang 5.0L GT 2015-21 | #MTRHD-15134300DCWC

ARH Long Tube Headers | Available from NEMESISUK.COM

American Racing Headers


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Long Tube Exhaust Headers
Direct Connection System 
1 & 3/4" x 3" with Catalytic Converters
for RHD Ford Mustang 5.0L GT 2015-21 
Manufactured by American Racing Headers | Part #MTRHD-15134300DCWC

ARH RHD Headers were exclusively developed in the UK on the Nemesis UK Project Mustang 5.0L GT.

The latest generation of Mustangs brought performance and handling to a whole new level, but power and torque as still waiting to be unleashed from an anaemic factory exhaust.

With ARH header systems in 1-3/4" and a 3" exhaust, the Direct Connect Kit unlocks that power with performance gains up to 30 RWHP.

What's more, they're designed to work for stock Catback systems, without any cutting or welding.

IMPORTANT: American Racing Headers Exhaust Systems are for OFF-ROAD use only.


  • 1-3/4" Long Tube Headers with Standard Catalytic Converters.
  • By using proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Light" issues
  • Capable of withstanding up to 1500 deg F
  • Ideal for forced induction applications, with no loss of HP
  • 100% Made in the USA - Never Outsourced
  • Made entirely of 304 stainless steel
  • 3/8" thick laser-cut flanges for a warp-free seal
  • Hand-ported TIG welded inlets
  • Optimized primary tube routing for superior fit and performance
  • Merge collectors complete with welded scavenger spikes
  • Catted systems feature 200 cell metallic substrate catalytic converters for extreme durability

Also available:

Why choose American Racing Headers?

American Racing Headers is the leader in high quality and high-performance header and exhaust systems. Made entirely in the USA with US sourced materials, you can rest assured knowing that ARH quality comes second to none.

Attention to detail drives every stage of their process, from prototyping to production. ARH exhaust systems have been race proven time and time again with championships to show it!

Vehicle Application:

  • Right Hand Drive Ford Mustang 5.0L GT 2015, 2016, 2017, 2018, 2019, 2020, 2021
  • *Please use the variant selector to indicate if your vehicle is 2018on Facelift version as this requires an additional connection element.

If you are in the market for a Catback as well please speak to us for advice.

**See what our Customers say about this product or add your own review**
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Customer Reviews
ARH 1-3/4" x 3" Long Tube Headers (w/ Cats) for RHD Mustang 5.0L GT 2015-21 | #MTRHD-15134300DCWC

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