Because the secondary O2 sensors will read the wrong values once these components are fitted
giving you a deeper rumble of an exhaust note compared to stock without any drone
To be installed as a kit with 988603 or 988613 and 988624 or 988626
without creating unwanted cabin noise
The software upgrade for the 1 Series E81/E82/E87/E88 123D was designed and tested at our dyno facility and on road to give optimal performance with maximum safety
Supersprint Turbo Downpipe With Metallic Catalytic Converter (OEM SYSTEM) - BMW Mini R56 Cooper S | JCW Cooper S Because the secondary O2 sensorsNOT ROAD LEGAL Turbo downpipe with integrated high flow metallic cat (sports cat) for 1. 6 THP PSA BMW engine, for Peugeot models (RCZ, 207, 208, 308 etc), Citroen (DS3) and BMW Mini (Cooper S, JCW) This Supersprint downpipe is designed to be a plug&play upgrade. It replaces the stock components without any modification. O2 sensor plugs and mounting brackets are in the same position as the OEM unit. CAUTION May cause the Check Engine Light to turn on,