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Cat Back Exhaust V3 [Mk3 Focus RS]

The mountune V3 Cat Back Exhaust for the mk3 Focus RS is the result of countless hours of engineering and ongoing product development, offering a product that is simply unrivalled in terms of performance, sound and features.

Extensive effort was placed on producing a sound profile that replicated the personality of the RS, with an aggressive note under full throttle, while maintaining a drone-free experience during cruising and light throttle.

Produced from 304 series, 3” mandrel bent stainless steel tubing, the mountune V3 cat back exhaust also includes many features used in motorsport applications; each tube joint is connected by either V-Band or custom double slip-joint, ensuring the best seal possible while maintaining adjustability and lightness.

Large 4.5” laser-etched polished tailpipes join the rest of the system via V-Band to allow even easier trim adjustment and future system customisation.


  • 3" stainless steel tubing
  • 4.5" laser-etched polished tailpipes
  • Includes new exhaust valve (motor assembly will need to be swapped from OE exhaust and is shown for illustration)
  • V-Band / double-slip joints throughout
  • High-flow rear silencer design
  • 10% lighter than OE system
  • Supplied with all required clamps and hardware
  • Compatible with OE downpipe / catalyst and mountune Downpipe / Sports Catalyst.
Customer Reviews
5.0 Based on 3 Reviews
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Filter Reviews:
    Flynn S.
    Australia Australia


    Awesome, no drone whatsoever.

    Jason B.
    Australia Australia

    Tom the ledgend

    The cutback exhaust as I would expect is great but by far the Overwhelming feature of this purchase was Tom wallace he is an absolute legend Not only could he not do enough during the sale but his follow-up was extraordinary.Thank you very much tom you legend

    Nick L.
    Australia Australia

    How an RS should sound.

    The exhaust is great quality, I mounted it on some Mountune exhaust hangers as well. Apart from having to cut the original exhaust to clear the rear axle, the install was a breeze. I ordered this from Mountune Australia, which was set to be on sale when in reality it was out of stock. Mountune really stepped up and went above and beyond and had one shipped from the UK to me. That is how you get a customer to stick around, really impressive. Highly recommended.