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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.

Whilst this product will pass current UK MOT tailpipe emissions regulations, it utilises a high-quality motorsport catalyst, which is therefore designated for off-road use only in the UK. 
If outside the UK, please check your local territories laws and regulations relating to emission requirements and motor vehicle safety standards prior to purchasing.

    Customer Reviews
    4.9 Based on 46 Reviews
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    Filter Reviews:
      Myke R.
      United Kingdom United Kingdom

      Mountune Sports Cat

      What a beautiful piece of kit, fabulously presented with all the fittings including gasket, this cat is obviously incredibly well made. Yes it is expensive but I bought this with the spring discount code which helped me get this purchase over the line! Well packaged and delivered Uber quickly (typically Mountune �) Mountune kept me informed throughout the purchase with details of delivery times etc. Looking forward to fitting it to the Mountune exhaust purchased previously .

      mountune Downpipe / Sports Cat [Mk7 Fiesta ST] Reviewmountune Downpipe / Sports Cat [Mk7 Fiesta ST] Reviewmountune Downpipe / Sports Cat [Mk7 Fiesta ST] Reviewmountune Downpipe / Sports Cat [Mk7 Fiesta ST] Review
      United Kingdom United Kingdom

      Great quality

      Over all great. The quality of the product is amazing no issues at all with receiving my downpipe. I would recommend to anyone.

      Paul A.
      United Kingdom United Kingdom

      Sports cat

      Very good !shame it can’t be seen as the quality is awesome