good info I started with suspension mods 1st i did the full m3 conversion and lsd. Im still reading reviews on the software upgrades e.g. jb4, dinan, giac etc. for the IS.
oem perf cf spoiler and front lip/m3strut brace/m3 subframe bushings/wavetrac lsd/ TMS solid diff bushings/MR adjustable toe arms/MR adjustable upper link/full m3 suspension/ecs tuning ss brake lines/GC coilovers./CPE dci's,catless dp,intercooler,charge pipe bov/BMS OCC/tuningtechfs tuned/RB pcv valve/defiv diff lockdownkit