Biggest downpipe on the market for both ST and RS Mk2 Focus, huge 3.5inch bore!
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AIRTEC Motorsport 3.5" downpipe for Focus MK2 ST/RS.
The AIRTEC Motorsport 3.5" downpipe reduces down to a 3" flange to fit the stock cat / aftermarket de-cat or sports cat.
We recommend this to be used with Stage 2 (ECU Software) but can be used with a standard car