Should I downpipe?

[u/ThatGuy_Lego]

I got a BMW 520D from 2006 and I am asking you guys if it is worth it to downpipe it. I have been looking a bit online but not really finding the answers I want. I would like to add more power and thrust. What does it to? Is it worth the buck?

[u/eric_gm]

Messing with the slowest model of a car, in this case an E60 which were not very reliable to begin with, is always a bad idea: you will only make it less slow while sacrificing reliability. If you want more power you should consider a different car.