STAGE 2+ 4th gear 11-22 2013 535i xdrive n55, MHD stage 2 plus. Car is stuttering after building boost through the power band.
POST-4TH GEAR REVISIONS 20 02 04 has good 4th gear pull to 6300, 20 03 12 also good but stops at 5800ish. Multiple times would get 30ff codes when attempting pulls. Also feels sluggish in 4th