I've been searching everywhere, but what mods would need to be done to obtain as close to 400rwhp as possible on the N54?
I don't really want to run E85 or meth if I dont have to...
Plus i'm on crappy CA 91 octane...
Would tune, intake, intercoolers, and catless dp's do it?
E90///M3 x 6MT x AE Performance x Bimmerworld x Dinan x PFC x TMS