This Audi TTRS performance exhaust is made in 2.5"/63.5mm bore pipework and replaces the secondary catalyst (Cat Bypass).
This de-cat sports exhaust is sold for motorsport and off-road use only and will NOT be able to pass a UK MOT emissions test or police roadside checks.
All relevant fittings and gaskets are supplied.
EML lights may activate after removing the standard O/E catalyst. An ECU Re-map is recommended to correct this problem and stabilise all power increases.
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Example of the Audi RS3 (8V) / TT RS (Mk3) Performance Exhausts (Secondary Catalyst Delete Pipes).