Used this DIY to get my local mechanic to change the downpipes and he did it step by step in about 2 hours. Cost = $200 :P. There were a couple of hangups due to us missing a step and having to undo some things and getting the clamps on the turbo pipe was a bit of a hassle but everything worked out. I can easily do it again now if I have to go through warranty work.
Current | 2011 E92 M3 - Mineral White, Black
Sold! | 2011 E92 335is - Titanium Silver, Black
Sold! | 2007 E92 335i - Space Gray, Black
Sold! | 2008 E90 M3 - Jerez Black, Fox Red