Make sure that exhaust includes downpipes. 400 is fairly close, I got around 365 rwhp with similar mods but that's with 91 octane. If you have 93 around where you live, it would be alot closer to 400.
Shouldn't really run stage2 without dps, but if you do get the dps and have an intercooler, run stage 2+ fmic. It's a large bump over stage 2.
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2008 E82 - 6 speed - CP-E Downpipes - Berk Mids - Hartge axleback - BMS DCI - Cobb Stage 2+ - Helix FMIC - Modified CDV
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