Car is a 2015 435XI M package, I have done all maintenance and mods myself. I retrofitted the HPFP and the flow is great! No issues at all.
Mods are:
VRSF CP, VRSF 6.5IC, dinan intake, B58 ( 5evo series) HPFP, stage 2 walbro LPFP, and tuned with BM3 100+ stage 2+ OTS.
After this I tuned the trans with stage 3 xhp and I plan to dyno next. It’s far quicker and way more responsive. I’ll post draggy times and a full pull as well. It’s pretty nutty.
435xi that’s the YouTube link!