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Hey all,
I am fully straight piped and I have fabspeed muffler delete and resonator delete and I have never had issues for months and now the car drives slower than stock and I was pushing 700hp with race fuel... I am not sure what they did with the vacuum lines since I have no more valves. Is there another area the vacuum line can be or is this the only exhaust one that they are referring to? Please help...
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2013 BMW F10 M5, Moonstone Metallic, 700whp, stage 2 tune, fully straight piped - catless downpipes - resonator delete and fabspeed muffler delete, cold air intake and many more cosmetic mods.  | '92 525i (long gone) | '02 Dinan M5 (sadly gone) | '06 Dinan M3 (also sadly gone) |