Axle back poll...

[GT83]

For me the Borla S-type and the FRPP X pipe is a great combo. It is loud when you get on it, but relatively quiet when you don't. Just by casually looking at the design, what you have now and the Roush should have similar sound characteristics. I haven't heard them side by side, but I would suspect the same between the FRPP Sport and the Borla S-type.

My guess is...
Roush and SLP Loudmouth = loudest
Borla and FRPP Sport = louder
OEM and FRPP Touring = not loud

My SLP Loudmouth are version 2 that come with muffler... NOT version 1 that are mufller delete (just a tube)

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[tom_sprecher]

Before posting above I looked them up.

This,

https://www.americanmuscle.com/slp-lm2-axleback-2015gt.htmlhttps://www.americanmuscle.com/slp-lm2-axleback-2015gt.html

Should have a similar sound characteristic to this,

https://www.americanmuscle.com/roush-axleback-exhaust-w-black-tips-1517-gt.html

Compared to this,

https://www.americanmuscle.com/borla-stinger-axleback-2015gt.html

If you want louder than what you have, the standard Loudmouth is what you want.

 

[LethalBlake]

If you want loud i would go with the Roush Axle back, i had them on my 2012 with off road X pipe and it was loud. I liked it but it did sometimes get to be a bit much on long distance highway trips.

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