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I have a 2015 Roush RS3
It was out of my hands at a shop for a week and when it returned to me it does not have the same exhaust note that it had before. It does not have the active exhaust feature. Can anyone think of anything that could have changed the way it sounds? I have had it since new and it had evolved into a neat braaapp sound at the end of each gear, was loud and one of the reasons I bought the car. It is now mild and quiet and it was evident that the shop had taken it offroad and had some fun in it. Dirt and gravel under the hood. I've been under it, exhaust isn't changed... I would appreciate any help

 

[GT_Dave]

If you do not have the knowledge or capability to thoroughly inspect the car, then you should find a competent mechanic to look it over. Sounds like you have some issues from the car being abused that will be difficult to determine by throwing limited information out here on a forum. If you have performance issues associated with the car sounding different, this may make it easier to find a root cause. The first thing that comes to mind is the possibility that a catalytic converter may be internally damaged and partially blocking the exhaust. I have seen this happen when a car is driven through high water and the very hot converter is cooled so quickly that it pops the welds for the internal plates.

 

[JimT]

If you do not have the knowledge or capability to thoroughly inspect the car, then you should find a competent mechanic to look it over. Sounds like you have some issues from the car being abused that will be difficult to determine by throwing limited information out here on a forum. If you have performance issues associated with the car sounding different, this may make it easier to find a root cause. The first thing that comes to mind is the possibility that a catalytic converter may be internally damaged and partially blocking the exhaust. I have seen this happen when a car is driven through high water and the very hot converter is cooled so quickly that it pops the welds for the internal plates.

I have to agree with Dave here, the issue is one that requires a detailed look. On the surface, abuse may be the cause, and a melted down converter can be the cause. It will rob your power and change exhaust tone. I would have a Cert. Tech look at it, if it is exhaust, you’ll want to fix that sooner than later. Keep us informed and welcome to the site.

 

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Thank you both for responding. The catalytic converter is a great recommendation.

 

[galaxy]

Even before investigating the sound change, I’d come completely unglued if a shop drove my car, much less sufficiently enough to get direct and gravel all up in it. That’s the first order of business.

 

[ringmaster]

Even before investigating the sound change, I’d come completely unglued if a shop drove my car, much less sufficiently enough to get direct and gravel all up in it. That’s the first order of business.

Agree. I'd be looking to strangle somebody first. Maybe just enough to find out what they did to the car. ;-) Just another example of why I don't trust anyone with my car(s).

 

[HotLap]

Even before investigating the sound change, I’d come completely unglued if a shop drove my car, much less sufficiently enough to get direct and gravel all up in it. That’s the first order of business.

Ditto and, unfortunately, there's no way to prove that they did the damage as it will be your word vs their word. I'd certainly not return to that shop and if (after you show them the dirt/rocks under the hood, etc.) they won't cooperate - Yelp the heck out of them and expose their incompetence....

Welcome to the forum and sorry to hear about your troubles...I'm with Ringmaster, no one touches my car except me and (my trusted Shelby co-owners)!