Downpipe / Sports Cat


£563.00 Inc. VAT
£469.17 Ex. VAT

The mountune Downpipe / Sports Cat has been engineered for the mk3 Focus ST 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. Constructed of 3” AISI 304 stainless steel mandrel-bent tubing with a CNC machined V-band flange that allows easy installation.

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.

Revised engine calibration will be required for optimal performance and may emit the EML without it.


  • 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 2.5” and 3” exhaust systems
  • TIG welded construction
  • Limited 2 year warranty*

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

*Please contact us for warranty terms and conditions.

    Customer Reviews

    5 Based on 25 reviews
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    Paul J.
    United Kingdom

    Exceptional product

    I managed to buy this with ease and if anyone knows Mountune most things can be out of stock! Fitting was a little awkward as done on stands and not much clearance. The engineering of the product itself is what makes me buy Mountune! Not much difference with sound but the Turbo spoils faster!

    Paul J. verified customer review of Downpipe / Sports CatPaul J. verified customer review of Downpipe / Sports CatPaul J. verified customer review of Downpipe / Sports Cat
    Guy B.
    United Kingdom


    Not had time to fit as yet but first impressions of the product are it’s a well made quality product.

    Robert Barber

    Great addition

    Just had the sports cat installed and the difference was immediately noticed with faster throttle response bringing smoother, increased acceleration. A bit throatier in noise output makes for a great all round purchase and the increased BHP is a welcome addition. A must buy and another piece of pure quality from Mountune- well done again!

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