ECE Downpipe Ø 76mm front pipe Car: AUDI S1 8X S1 I 2.0 Engine: CWZA Ltr. 2.0 KW: 170 Euro 6 Remark: If a muffler is omitted due to the installation of a tuning catalytic converter, the noise behavior must be re-evaluated within the scope of an operating license for the vehicle in accordance with § 21 StVZO ECE/Street legal Part no.: 90 81 1105