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30 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.


  • 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 30 Reviews
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    Filter Reviews:
      Robert M.
      United Kingdom United Kingdom
      sports cat and brakes

      Excellent products very happy and fast postage too.

      Alex L.
      United Kingdom United Kingdom
      Very good quality and sounds great

      Extremely good build quality. The car burbles nicely when fitted, noise ins't increased drastically, but tone is much deeper. With a non-res exhaust, you can also hear turbo whine/spool. Car feels more eager and as if it has better torque down low.

      mountune Downpipe / Sports Cat Review
      Stephen M.
      United Kingdom United Kingdom
      1st class part

      I recently purchased this part for my fiesta. Wow, superbly made.I am an engineer, worked in cnc machining, fabrication and toolmaking and like all mountune parts it is real quality. Only shame is i was not allowed to mount it on the wall at home. So it had to go on the car! You get what you pay for and this part matched to the cat back is a joy to have. Great sound, great quality, great service. Thanks Mountune.