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  1. Turn Up the Volume - Cat-Back Exhaust R&D, Part 2: Sound Testing

    Turn Up the Volume - Cat-Back Exhaust R&D, Part 2: Sound Testing

    In our last post we took a good look at the stock Fiesta ST exhaust and the initial design of our cat-back exhaust. The exhaust was fabricated and installed on the car and then it was time to test the stock system.

    exhaust post 5

    To Resonate or Not to Resonate

    Getting the sound just right was quite a process. Our initial prototype featured 2.5" piping with a single rear muffler. This design did not feature a resonated mid-pipe unlike the stock unit. The initial design was sound tested on the dyno and also test driven by several members of the team. While we loved the low growl of the exhaust as it was, we wanted to test a resonated version before settling on a final design. As with all exhaust development projects, we are aiming for a final product that sounds great on throttle while still being

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  2. Turn up the Volume - Cat-Back Exhaust R&D, Part 1: Initial Fabrication

    Turn up the Volume - Cat-Back Exhaust R&D, Part 1: Initial Fabrication

    As many of you are aware, here at Mishimoto we have been going Fiesta crazy developing various Fiesta ST parts such as;

    • Performance Aluminum Radiator
    • Oil Cooler Kit
    • Performance Air Intake
    • Direct-Fit Baffled Oil catch can
    • Downpipe and  Intercooler/Piping coming soon!

    Up next is something that the team here has been very eager to start development on, the Fiesta ST Cat-Back Exhaust! We are excited to let you in on the details of the development of our first prototype. As with any exhaust project, we are shooting for improvement in flow over stock as well as a great overall tone that is drone-free. Check out the details and let us know how we did!

    Stock Component

    To begin, we gave the Fiesta ST's stock exhaust setup an once-over to see what we were working with. While it is not terrible, we do see some room for improvements. As you may have noticed, the stock exhaust has two mufflers. One rather

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