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Stage 1 just go with tune of choice. Do not go Stage 2 on a stock turbo.
Stage 2 upgrade your turbo, BEF, FMIC, DV+, CP(I think the DP is optional at this point)
Stage 3 Turbo, FMIC, BEF, CP, DP, LPFP and PI, JB4
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
IG: @bmwdoubles
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