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Bringing this older thread back.
Couple of things:
I've attempted to retro a M4 hpfp to my N55 around 2016-17. Total disaster. We had to swap out the alternator, new wiring harness for the alternator, new DME, re-pin the DME, problems with the fuel ekp. After all that we went back to stock due to never getting it to work right.
Fast forward to now.
Helix Overdrive!
Have not purchased one yet due to it being so new to the market. Reached out to some who are using it on IG and so far they are reporting no problems. I'll most likely make the move if they are still good by early next year.
Anyone here using the overdrive kit?
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
IG: @bmwdoubles
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