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36 reviews


Downpipe / Sports Cat [Mk7 Fiesta ST]

The mountune Downpipe / Sports Cat has been engineered 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.

A large catalyst cross section means increased exhaust flow compared to other smaller catalyst equipped down pipes on the market.

Constructed of 3” primary AISI 304 Stainless Steel mandrel bent tubing with a CNC machined flange that allows easy installation, whilst robust factory type mounting brackets and hangers are utilised to maintain perfect alignment and OE like fitment.

Also incorporated is a 6” stainless steel flexi section to help absorb shock, prevent OE hanger failure, and a reduced the chance of false knock signals causing engine power reduction.

Revised engine calibration will be required for optimal performance and may emit the EML without it (our mr230 / m285 calibrations both support this).


  • Large diameter motorsport type, high flow 200 cell count catalyst 
  • 3” AISI 304 mandrel bent Stainless Steel tube with 2.5" flanged exit
  • Robust OE type mounting bracket
  • 6” Stainless Steel flexi joint 
  • TIG Welded construction
  • 2 year limited warranty*

Recommended to fit in conjunction with mk7 Fiesta ST Cat Back Exhaust.

*Please contact us for warranty terms and conditions.

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
    4.9 Based on 36 Reviews
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    Filter Reviews:
      Norway Norway

      good quality and fast delivery

      superb, can't complain 1 second

      David E.
      United Kingdom United Kingdom

      Downpipe / Sports Cat [Mk7 Fiesta ST]

      Fitted at the same time as the Mountune exhaust. Superbly made, and fits perfectly. When you compare the old and new downpipe you can see that this can only help the engine breathe more easily.

      United Kingdom United Kingdom

      ST180 - Sports Cat

      Brilliant! I'm a mechanic and this is one of the highest quality parts I've seen! Welds are immaculate (although no one will ever see them!) Very impressed. Just got to see if ot hold up to the test if time now!