I have a Sprint Booster and a BMS stage 1, and I am quite happy with this set-up too. I don't drive the car much though but when ever I do, it does get rid of the low end bog, where it has so much lag .
it feels like a different animal now all this while being reliable as well. I think BMW stage 1 pushes it to 50-60 HP/50-70 TQ, enough to make you grin
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