ARH 1-3/4" x 3" Long Tube Headers With Cats for LHD Mustang 5.0L GT 2015-23 | #MTC5-15134300DCWC

ARH Long Tube Headers | Available from NEMESISUK.COM SALE

American Racing Headers

£1,535.09 £2,192.99
SKU: MTC5-15134300DCWC

Long Tube Exhaust Headers
Direct Connection System 
1-3/4" x 3" with Catalytic Converters
for LHD Ford Mustang 5.0L GT 2015-23 
Manufactured by American Racing Headers | Part #MTC5-15134300DCWC

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 3" Direct Connect Kit with Catalytic Converters 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.
  • 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


Euro Emissions Standards:

*As ARH catalytic converters are designed primarily for the US market, they are not officially tested to Euro Emissions standards. However, ARH have tested a large variety of catalytic converters. Through their own testing, with local garages and test laborities, ARH have established their catalytic converters perform equally as well as the Euro Type Approved catalytic converter equivalents.
Please note. These are Non-Type approved catalytic converters. It is therefore, “ILLEGAL

Warranty Information:

The manufacturers catalytic converter warranty covers the construction of the catalytic converter, and does not cover against emissions testing. Vehicles running healthily that are not  running too lean or rich should pass an emissions test with ARH catalytic converters installed without issue, but this is not a guarantee. The warranty covers failure of the catalytic converter. Should the catalytic converter fail, please contact us to discuss your options.

Why Choose Nemesis UK?

Nemesis UK sell only genuine parts and are honoured to be the top distributor for ARH products in the UK. Please be aware of other online retailers selling copycat versions of ARH products with similar part numbers. These are not manufactured to the same standards as ARH catalytic converters. These will have a lower weight of precious metals in their construction.

Our warehouse holds the UK's largest stock of direct-fit exhausts, universal mufflers and catalytic converters, offering next-day despatch on 100s of parts.



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:

  • Left Hand Drive Ford Mustang 5.0L GT 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
  • *These will fit 2018+ Facelift Applications but will remove the GPF / Gas Particulate Filter. Custom tuning / programming will also be required. Requires O2 sensor looms to be extended due to the different plug connections on later 2018+ Facelift models.

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

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SKU: MTC5-15134300DCWC

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