![Downpipe / Sports Cat [Mk4 Focus ST] fitted-pumast larger airbox shape (with detailed](https://cdn.shopify.com/s/files/1/0367/2621/products/2743-DPSC-AAb.png?v=1623685735)
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
larger airbox shape (with detailed airbox lid)
The superior quality and durability of the mountune dipstick makes it a logical upgrade from the factory OEM plastic unit
Engineered from SUS 301 chromium-nickel stainless steel with welded Integrated Compression Ring layer
or hybrid turbocharger
The mountune roll restrictor for the Puma ST and latest face-lifted Mk8
Downpipe / Sports Cat [Mk4 Focus ST] fitted-pumast larger airbox shape (with detailedThe mountune Downpipe Sports Cat has been engineered for the Mk4 Focus ST to reduce exhaust back pressure at the turbocharger, allowing faster response and additional power. Featuring a large diameter motorsport style, 200 cell count metal substrate honeycomb catalyst, to ensure effective, ultra high flow performance, the mountune downpipe sports cat is also constructed of 3 AISI 304 stainless steel mandrel bent tubing with TIG welded joins throughout