EU customers, please read before purchasing

Important Info

Search our store

26 reviews


Downpipe / Sports Cat [Mk3 Focus RS]

The mountune Downpipe / Sports Cat has been engineered for the mk3 Focus RS to reduce exhaust back-pressure at the turbocharger, allowing faster response and additional power.

Features include a large diameter 5” motorsport-type, 200 cell count metal substrate honeycomb catalyst, to ensure effective, ultra high flow performance in extreme environments.

Additionally, robust OE-type mounting brackets and hangers are utilized to maintain perfect alignment and OE-like fitment. Also incorporated is an 8” stainless steel flex section to help absorb shock and prevent OE hanger failure.

Supplied with adaptor sleeve to suit either the OE cat-back or mountune cat-back exhaust.

Revised engine calibration will be required for optimal performance and may emit the EML without it (our m380 / m400 calibrations both support this).


  • Large diameter motorsport-type, high flow 200 cell catalyst
  • 3” AISI 304 mandrel bent stainless steel tube
  • Robust OE-type mounting bracket and hangers
  • 8” stainless steel flex joint
  • Compatible with OE / mountune cat-back exhaust

Recommended to fit in conjunction with mk3 Focus RS Cat Back Exhaust.

This product has been designed and is intended for UK markets and complies with UK MOT tailpipe emissions regulations. Installation of this part on a vehicle that is driven on public roads outside the UK may violate other territories laws and regulations relating to emission requirements and motor vehicle safety standards.

    Customer Reviews
    5.0 Based on 26 Reviews
    Write a Review Ask a Question
    • Reviews
    • Questions

    Thank you for submitting a review!

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

    Filter Reviews:
      Alejandro S.
      Spain Spain

      Me encanta! Ahora suena en armonía con el conjunto de escape, la instalación lleva tiempo, pero merece la pena. Congratulations Mountune!

      Andrew H.
      United Kingdom United Kingdom
      Excellent quality as always

      I have not fitted yet

      United Kingdom United Kingdom
      Sport cat

      Had it fitted today, well it’s made it smoother and the response is nice, v3 exhaust growls a lot more, great piece of kit well worth having.