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      01-10-2013, 02:41 PM   #34
Sluggoslinger
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Drives: 2012 550i Dinan Stage 4
Join Date: Oct 2012
Location: Orange County, CA

iTrader: (1)

I also have stage 4 and there is no turbo sound difference that I can hear.

I'd say the difference in power is comparable to driving your car on a crisp cool day. It feels like it is breathing better. At this point I probably have enough power to keep me happy. When stage 5 comes out, I might do it just cause... Why not...
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