I am keeping my expectations reasonable for now. The delta is going to only be the flash, not the exhaust and filters. Also, most gains are not as big as advertised on the m64 as the engine is under rated. So when someone puts down X over stock, it looks much larger than reality as the car is putting out at least 2% more than stock numbers.
I also am not looking for a low end tq monster that gets winded up top. I want a nice steady pull to redline. So, massive gains down low isnt a priority for me.
2015 - m4 - hopefully
2011 - 335is e92 - Cobb PTF E40/Rob Beck/AR/Helix (458 rwtq and 479 rwhp - @ 17 psi and 6,000 rpms)
2007 - 911 Turbo - EP1/AMS (617 awtq and 500 awhp) - Retired
2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired
2003 and 2005 330i/ci zhp - Stock - Retired