Cat Back Exhaust V3 - RS - Fully Fitted at mountune HQ


This part does not affect the base vehicle warranty.

The mountune V3 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 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.

Full drive mode functionality is also maintained with the inclusion of an OE valve and motor assembly, requiring nothing to be switched over from the standard exhaust.

Large 4.5” laser-etched polished tips 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 trims
  • Includes new valve and motor assembly 
  • V-Band / double-slip joints throughout
  • High-flow rear silencer design
  • 10% lighter than OE system
  • Supplied with all required clamps / hardware
  • Compatible with OE downpipe / catalyst and mountune Downpipe / Sports Catalyst.

Please note: the price shown for this Cat Back Exhaust upgrade also includes installation at mountune HQ in Hutton, Essex and is not transferrable to any other Ford dealer or installer. 

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you back to confirm this date. If we can't accommodate your preferred choice, the team will discuss with you other available dates, that are still acceptable to you.

Customer Reviews

Based on 6 reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review
  • Reviews

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!


V3 exhaust

The v3 exhaust is a must fantastic quality and what a sound it gives . The v3 exhaust totally transforms the RS. The service we received from Mountune was brilliant Ryan was very friendly and talked us though what was happening.


Mountune V3 Car Back Exhaust

Incredible difference, raspy tone is so much better than stock. In sport mode, the pops are more frequent, less predictable and a lot louder than before. Also on long motorway drives, no annoying drone. The V3 product is a brilliant addition to the RS. Fantastic service by Ryan and the team at Mountune HQ.

Ray Green

Great addition to the RS

Just had the V3 Cat Back exhaust added to my Blue Edition, which already had the FPM375 upgrade. The new exhaust has a much better sound than the stock one and virtually doubles the sound of the exhaust when ot pops and bangs. It also extracts more of these bangs which is good too. It also has a nice burble on start up. It might be psychological but it seems a bit quicker but this is probably just the noise as I don't believe it increases the power. Overall coupled with the 375 it's lifted the character of the car. Great service from Ryan and the team!

Related Items