Downpipe + Metallic catalytic converter

Turbo downpipe with high flow metallic cats by HJS Motorsport http://www.hjs-tuning.de/en/3/105/0/seite_1/Technics/Sport-Catalytic/sport_catalytic.html for BMW F20/F21 1.6 Turbo

CAUTION: because the OEM catalytic converter are replaced it may cause the triggering of the Check Engine Light caused by an O2 sensor error.
ECU tuning is recommended.

Thanks to the reduced backpressure compared to the OEM unit this component allows for a quicker turbo spool up and a consistent power and torque increase in the whole rev range.