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I will say that I just added this mod and I'm not sure about adaption time if any. Also my current tune probably needs to be updated to leverage it. I'll be visiting GSR soon and give updates at that point. The best effect was top end has noticeably improved.
Also my car smells like a carbureted big block when idling at the light. I don't mind just wish I had the exhaust note to match. Stupid 5 series grandpa mufflers are killing my exhaust game.
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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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