Originally Posted by smellthebeans
What's the difference between stage 2 and the stage 3? Exhaust header cat delete?
As far as I know stage 2 is an on-road tune for an N52 engine with std non-3-stage manifold. Dunno what a stage 3 tune is, don't think there is one really. There are custom tunes with headers, etc. and off-road tunes, iIRC. Andrew's the guy with the right answers though.
2011 E90 328i ZSP 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+AA, SS+CI528+ThermoTec+Burns, AKG eng, UUC trans, Delrin diff/RS, CM 850, UCP, CAE shftr, AKG DSSR, PG 3.91 30/60 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, fully Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 4pt roll bar, Braille, RT DL1Mk3