Quote:
Originally Posted by bavarian19
Yes. During deceleration. What causes that sound?
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Don't know. Hopefully somebody can shed some light on this.
When I first heard it I was a bit concerned so I googled it and found varied ideas (from normal, to misfire, to leaks, etc) and this happens to other exhausts as well. My exhaust was checked for leaks after the install so I am not so concerned. Maybe the exhaust is just letting off on deceleration? I'd be more concerned though if the same sputtering happens on acceleration.
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E90 2007 / Step / Montego Blue / Black Dakota Leather / Premium / Cold Weather
MODS: Exterior: Blacklines, debadged, HO ceramic 35% tint, Hoen yellow fogs, matte black grille, OEM style splitters, Halogen-to-Xenon Interior: Alum pedals, CF wrapped trim, V1 and Nuvi hardwire, M-Tech tri-stitched wheel, SMG M5 shift knob Performance: AluFelgen CSL 19" 8.5 ET33/9.5 ET30 with 5mm rear spacers | GY Eagle F1 Asym 235/265, KW V3, BMW Perf exhaust+intake