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whoosh spec Thermal R&D 3" cat back exhaust 2014-2019 Fiesta ST

$ 849.99
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NEW and Exclusively available at whoosh motorsports, a new version of the very popular Thermal R&D exhaust system for the Fiesta ST!
  • 3” T304 Stainless Steel Cat back System
  • Mounts to OEM catalytic converter.
  • Utilized OEM Hangers, Tip Fits OEM Valance
  • Brush finish throughout with Black Satin powder coated 2.5" tips

When the Ford Fiesta was finally introduced to the North American market, the engineers at Thermal were eager to get their hands on the car and see what we could do with the sound and performance. 

We started with the cat back system, keeping in mind the downpipe for the full turbo-back systems would be necessary. A 3” system made was the ultimate choice, and the dual polished 2.5” stainless tips gave the system a more finished aftermarket look.

To address the drone issues that can arise from the larger 3” tubing we added a straight through resonator on the mid-pipe and a resonator on the rear section. This allows for no restriction when accelerating, but deflects the unpleasant tones that can creep in while cruising.

 

With the Ford Fiesta finally being introduced to the North American market, the engineers at Thermal were eager to get their hands on the car and see what we could do with the sound and performance.

 We started with the catback system, keeping in mind the downpipe for the full turbo-back systems would be necessary. A 3” system made was the ultimate choice, and the dual polished 2.5” stainless tips gave the system a more finished aftermarket look.

 To address the drone issues that can arise from the larger 3” tubing we added a straight through resonator on the mid-pipe and a side branch resonator on the rear section. This allows for no restriction when accelerating, but deflects the unpleasant tones that can creep in while cruising. Overall, the Fiesta ST Catback exhaust is a system that we are very excited about launching alongside our popular Focus ST system and soon to come Focus RS system. 

Customer Reviews

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Customer Reviews

Based on 10 reviews
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Z
Zach
Best exhaust

This was by far the best exhaust system I've heard for this vehicle. Perfect fitment, great exhaust note and no drone!

F
Fred Galindo
Very nice sounding exhaust! Thermal R & D

I am more than happy with this exhaust. Absolutely no droning and was an easy install for me with a floor jack and jack stands.
Thanks again Thermal & Ron at WhooshMotorSports

C
Caleb
Best sounding catback for the platform

Expensive but definitely my favorite exhaust for the fiesta st. Installation is pretty simple and can be done with the car on jack stands but is definitely more ideal on a lift. I've done two, one using each method.

A
Aidan Severy
Made the car feel complete

I initially did a resonator delete on a stock system, then went on to do a full intake, s280, etc. I was hesitant to get the thermal but it honestly made the car feel complete and much more enjoyable to drive. No drone is present when cruising in 5th or 6th, and the black tips are nice in my opinion.

J
Jeff
Even better than expected

For months I had been looking at all exhausts I could, listening to clips on you tube, inspecting local ST's running aftermarket exhausts. I never ran into Thermal R & D in person, so I took a bit of a leap relying on sound from a laptop or phone audio. By a mile this exhaust sounds the best on subpar audio and in person it gave me the tingles. I second the comment about the dual tips could look cleaner if they were staggered, but that is the only thing. They still look good in black though.