This stainless steel downpipe for the BMW 5 Series F10, F11, and F07 with N20 engines (520i & 528i) replaces the restrictive OEM catalytic converter. The decat version significantly improves exhaust gas flow, resulting in more power, faster throttle response, and a sportier sound.
The downpipe features two lambda probe connections and is made entirely of high-quality stainless steel. It's the perfect choice for anyone looking to optimize their BMW for performance tuning.
Advantages
• Suitable for BMW 520i & 528i (N20 engine, F10/F11/F07)
• Stainless steel construction (T304 stainless steel)
• Decat version – maximum flow
• Equipped with 2 lambda connections
• Direct replacement for OEM downpipe
Contents
• Downpipe Decat
Frequently Asked Questions
Is an ECU remap mandatory?
Yes, when fitting a decat downpipe, ECU remapping is necessary to prevent error codes and malfunctions.
Does this downpipe fit directly without modifications?
Yes, it is designed as a direct replacement for the OEM downpipe.
What is the difference with a sports cat downpipe?
A sports cat retains partial emission control, a decat gives maximum flow and performance.
