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, PI+RM+3IM+AAstg3, SS+CI528+ThermoTec+PE, AKG eng/UUC trans mnts, ATI, CM 850, CAE shifter, AKG DSSR, PG 3.73 2-way 100% LSD, HVT 3-way, adj ARB end links, TMS Delrin diff/RS, M3 arms/links, RE toe arms+Aurora PR, all BW spherical bearings, Vorshlag CPs, HPA M3 brace, ARC-8 18x8.5, 255 R1R, 135i calipers+ST kit+Ti, BW guide bushings, XP10, ST lines/RT700, F30 shields, Safecraft, Schroth, M3 steering wheel, RT DL1Mk3/DASH3