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      04-24-2009, 08:28 PM   #13
dogears
My master volume goes to 11
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Drives: 2021 BMW M5 Competition
Join Date: Dec 2008
Location: Cherry Hill, NJ

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Serious crazy drone on cold start for about 20-30 seconds. Then all is quiet.

Throatier under acceleration. No drone in most cruise situations unless you need to apply a bit of throttle and then the healthy tone comes back.... I had this even with stock mufflers, just a couple db less.

I don't have secondary cats and my primaries are high flow. I had a bit more tone even with stock mufflers. It really sounds great now!

Quote:
Originally Posted by frankzlin79 View Post
dogears: Did you get sport or race? How is the drone level at a constant cruising speed?
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1987 Buick Grand National, 2009 BMW E90 M3, 2016 Audi S6, 2018 MB E63S AMG, currently in 2021 M5 Competition
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