2019 Mach 1 Mustang Prototype

Spy Video: 2018 Mach 1 Mustang Mule Spotted Testing in the Wild!

A lot of speculation has been surrounding the 2018 Mustang, but from recent spy video that was captured in Michigan, it looks like we will be getting an S550 Mach 1!Originally reported by Mustang6g.com, a pieced together S550 was spotted driving around near Ford Headquarters with mismatched wheels, an aggressive chin spoiler, and a beefy exhaust note pouring out of a quad exhaust setup.

While this test mule didn’t sport the iconic shaker hood that has long been a hallmark of the Mach 1, it gives us a good glimpse at what Ford has been working on since debuting the S550 GT350 and GT350R.

S550 Mach 1 Engine?

The biggest question on many Mustang enthusiasts minds after hearing the exhaust note in the above clip and seeing the large quad exhaust setup, is “what engine is under the hood?” While it’s obviously not an EcoBoost or V6, it is uncertain if this is a 5.2L Voodoo engine like that found in the Shelby GT350, a ‘massaged’ 5.0L from the GT, or possibly something else entirely.

Undoubtedly, it is naturally aspirated, keeping in line with the history of the Mach 1 package; it’s just S550 Mach 1 Exhaust Tips hard to pin point what mod motor beast is lurking under the hood of this test mule. It is possible that Ford is going to reintroduce the 5.4L or 5.8L Shelby GT500 engine, this time without the blower, judging as how the quad exhaust is almost identical to that off of the ’13/’14 GT500.

S550 Mach 1 Exterior StylingMach 1 S550 Mustang Chin Splitter

Aside from the mismatched wheels on the test mule, there are some noteworthy takeaways on the design and styling of this Mach1 in the making. The wide and aggressive front chin spoiler that extends off the front bumper is held onto the body with two adjustable prop rods, something you would expect to see on a serious road race car.

The decklid/trunk and spoiler captured on the test mule are a different color than the body and feature a relatively subtle and slick design. It does call to question how far into the design process Ford is and if there is still some development to go on the back-end.

Also popping off the oxford white body are a set of red Fender Hash Marks over the driver’s side wheel–an interesting design choice from the factory and another possible clue in to the identity of this Mustang.

S550 Mach 1 WheelsMach 1 S550 Test Mule Wheels

The mismatched front and rear wheels on this test car lead us to believe the Mach 1 will come with a staggered setup, which isn’t a surprise or a stretch considering you can order a PP GT with a staggered setup as well. This mule is using 10-spoke brushed aluminum wheels in the rear (similar to the Boss 302 Laguna Seca Wheels) which are fitted with Pirelli P-Zero 275/40R19 tires, with the front runners being the ebony black GT performance pack wheels.

What are your thoughts on this test mule? Is this going to be the new muscled-up Mach 1 we’ve been dreaming of? Or is this just a revamp of the GT? Comment below with your thoughts!



  1. Ill tell you the guy driving it definitely felt like such a BOSS; that much is for certain…Or being the “Mule” he just felt like an ass but pretty sure more of a boss. The mismatched wheels looks mad dumb tho. Like the owner couldn’t afford all four or something but idk…guess i’m just really hoping Ford isn’t actually sendin’ final productions out with to the streets! Just so goofy looking for such a dope car to have.


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