This sucks, what a pain in the ass for you. Did you ever run 0-60 times? I believe stock 750i with or without xdrive is 5.0 and 750li is 5.1 with or without xdrive. Timed my 750i at 5 consistently when stock and now runs 4.3 consistently. This does not jive with your 1/4 mile times. Try some 0-60 runs. Like I said before, it's sad how many people are drive around without Dinan installed, thinking it is. What a scam.
Dinan S3, PedalBox, 22" Agetro rims, H&R spt springs, RDsport front lip, coded, paddle shift retrofit, AlpineMSS HID 8000k. All exterior chrome, roof, roof spoiler and everything behind wheels painted black, wing, side and rear reflectors and door handle trim painted white, light smoke on tail lights. Audio: focal separates, earthquake low profile subs under front seats (crossed over as mid base to support the pathetic 4" fronts), arc audio amps, audiocontrol lcq-1 and epicenter, (2) L7 subs.