TESTED: Ford Performance Cat-Back Exhaust and GT350 Valence

Shelby GT350 lower valenceThe GT350 lower valance is much larger than the piece it replaces. There are integrated faux exhaust tips that look similar to an R35 GTR, which is a design that many manufacturers have adopted. The GT350 utilizes a differential cooler with a functional diffuser and NACA ducts that direct air though the cooler and out of the two functional vents to the center of the exhaust tips. Before we could install the valence, there were a couple things that needed to be installed first.

valence reflector 2015 mustang gtThe new GT350 lower valence does not come with the rear reflectors installed. It is necessary to remove the originals from the old valance via this 10mm nut (left) and plastic clip (right).

Installing reflector on gt350 valenceInstalling the old reflector is easy.  Push the clip side in and then tighten the metal locking nut on the other side and you’re done. All that’s left is to install the reverse light and we were good to put it on the car.

Installing Shelby GT350 lower valenceWith the reflectors and reverse light installed, Will from RareFab mounted the GT350 lower valence on to the car.

GT350 FP exhaust muffler mis alignedUnfortunately, the Ford Performance exhaust did not line up with the GT350 valence-mounted exhaust tips. Not only does this look bad, but it could potentially melt the plastic valence and cause the faux exhaust tip to fall out. Needless to say, it was really important to ensure the exhaust was lined up with the valence mounted tips.


  1. Great sounding cat back. But how much louder is the sport from Ford Performance? Also is the tone deeper on the Ford Performance than on the Borla?

      1. I have a 2017 GT PP and I have the Ford Performance power pack level 2 installed by My local dealer. Would I benefit more from the touring or sport cat back?

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