E82 120d Downpipe etc

[Alli26]

When I fitted my downpipe no error codes were thrown. performance wise the throttle response was slightly better. I haven't had any issues with it to report on my side.

I have an RK tune on my car as well. There is a puff of smoke that comes out when dropping a gear. The only heavy smoke I have noticed is when I downshift and my foot is flat on the accelerator.

From my experience I would definitely recommend fitting a downpipe and getting a custom tune.

Hope I'm not beating a dead horse 5 years later here, and I find myself considering the above. How did the car cope with the extra power Kasvir? Reliability wise..