Exhaust header ideas
 

I am coming to the point where I need to replace the exhaust manifold and ill be doing the whole exhaust at the same time. Just need some info on what will fit. I have a 2008 528i with the n52b30 engine.

As far as an aftermarket header you have a few options, Supersprint makes some good ones but they are $$$ or you can get an E9X/E8X ebay header, cut the DP to exhaust flanges and reweld at the correct angle for E6X or I believe some shops in europe make some cheaper E6X headers but shipping may kill you.

There is also the option of the stock european N53 headers which have a shorty header built in and smaller cats

Thank you for the info
 

I will probably just reuse my stock cats and just replace the gasket and o2 sensors. I figured the e9X would fit with some adjustments but didn't think that was any better than using the stock flanges and going from there.