Milltek - Catalyst Delete Pipe Audi S4 4.2 V8 Quattro B7 blck-by-rbk - comes in a number

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including optical tuning or other elements of standard vehicle equipment

Audi A4 S-Line B7 Avant 2004-2007

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Milltek - Catalyst Delete Pipe Audi S4 4.2 V8 Quattro B7 blck-by-rbk - comes in a numberStand out with this incredible Milltek Catalyst Delete Pipe for your Audi S4 4. 2 V8 Quattro B7. (Years: 2004 2009) Manual Models Only Must be fitted with the Milltek Sport cat back system Requires a Stage 2 ECU remap The part is used to bypass the catalyst from the exhaust to create a Decat system. Eliminating the catalyst will greatly enhance the gas flow and the performance, adding significant Hp to your vehicle by removing the density of the