2006 330i, TSM, Black, manual, sport
Drives: E90 330i, E86 Z4 3.0si
Join Date: Nov 2005
Location: Chester Springs, PA
Target price is $1,200
They aren't designed yet, so we have no idea of pipe sizes.
The e46 M3 headers have an option for ceramic coating so I don't know why they wouldn't offer that option for the N5X header (it's $335 extra).
I'd imagine you'd have to install a high-flow cat to pass emissions. I'm actually going to be doing just that myself. I'll have them dyno test with and without the cat so we can have a comparison.
2006 330i, TSM, Black, Sport, JIC Cross Coil-Overs, UUC Sways, 18" Advan RS, Mich PSS 255/265, BMW Electric Steering Wheel, Rogue shifter, M-Tech front, CF emblems, Dinan TB, Intake, exhaust, strut bar, Stoptech BBK, LSD, M3 susp., LUX 5, CF Hood and CSL, Sparco Seats, AA tune, CF Roof