Steeda S550 Mustang GT V8 3" Catback System 2015-17


Steeda's 3" diameter Cat-Back Exhaust System for the 2015-2017 Ford Mustang Fastback GT. It provides maximum horsepower due to the oversized 3" design & the best flow & sound without annoying drone*. Constructed from 304-stainless steel for corrosion resistance with tips embossed with Sidewinder logo. Features X pipe.

Please note all prices here are estimates and vary depending on size / weight and location.

As a guide, UK Mainland are all addresses not in Northern Ireland, but does include Islands, and Scottish Highlands. Delivery to "Highlands & Islands" can take a few extra days.

EU deliveries cost varies on service requested and weight / dimensions. Normal quote is via the cheapest "standard" delivery. Small Package delivery option is available for EU deliveries under 2 Kg, ideal for small parts.

Local Pickup can only be used in prearranged circumstances, e.g a car show etc.

FREE SHIPPING is available on order over a certain amount (country dependant)

Delivery Service   Time  Price inc VAT
Royal Mail Registered (small items) UK 2-5 days £4.98
Royal Mail Registered (small items) 1-2 days £9
Parcelforce / UPS / DPD / DHL UK Mainland 1-2 days £11.40
Parcelforce / UPS / DPD / DHL Overnight, pre 9am, or AM 1 day  varies on option - ON REQUEST


If you have issues with damage through shipping it is ESSENTIAL that we get photographs as it is impossible to take up the case with couriers without proof of damage. The following will be required, further pictures may be required.

1. Pictures of the shipping label (e.g carrier shipping label)

2. Pictures of the damaged packaging (if applicable)

3. Pictures of the damaged item


Steeda is proud to introduce our new 3" diameter Cat-Back Exhaust System for the 2015-2017 Ford Mustang Fastback GT. We have designed this system to bring out the performance in your American made muscle car. Our cat-back exhaust design provides maximum horsepower due to the oversized 3" and the best flow and sound without annoying drone*.

This Steeda S550 Axle-Back Exhaust System is constructed from 304-stainless steel for better than OE equivalent corrosion resistance. The tips of our Steeda 3" cat-back exhaust are constructed from polished 304-stainless steel and are embossed with Steeda's signature Sidewinder logo.

The installation of this Cat-Back Exhaust System takes only 2-3 hours using common hand tools.

If you are serious about making power, this Steeda S550 Mustang Fastback GT Axle-Back Exhaust System delivers. The 3" diameter flows adequate whether you have a few add ons or a full blown power adder. Our exhaust kit includes necked down adaptors for a factory style connection to OE converters.

Product Benefits:
  • Adds deep muscle car tone
  • Great daily driving volume with no drone
  • 304 stainless construction provides OE or better corrosion resistance
  • Maximum horsepower with simple bolts ons as well as full on power adders
  • Compatible with most full tube headers
  • 4" diameter chrome tips


* Note Automatics can sometimes suffer from increased drone to ultra low revs used by economy seeking software. Often sport mode can cure this. This tip applies to all aftermarket exhausts not just the Steeda system.

Part: 555-3615
Fitment: 15-17 GT not inc convertibles

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