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Old 02-23-2013, 09:56 PM   #54
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Join Date: Feb 2008
Location: Philadelphia
Posts: 6,919
My Ride: M3 & ZHP
Originally Posted by jabela View Post
I can confirm a vibration at 1000 rpm but it's only very noticeable if you hold it there. I changed the engine and transmission mounts to M3 mounts. The thing I like best about the change is improved shifter feel.
Originally Posted by E46Mango View Post
Wanted to add my experience. I installed OEM M3 engine and transmission mounts. If the increase in response is 10%, the increase in NVH is 30%. The increased NVH is mainly noticeable below 2,000 RPM. My particular case vibrates the car at a very very narrow RPM window (roughly 900 to 1000 rpm) anything below or above and the vibration stops. It's a pretty rough vibration too.

I'm still okay with my decision but I think if I had to do it over again I'd probably pick stock replacements.

This surprises me since the M3 idles right at 900-1000. And the M54 Z3s come w/ M3 mounts stock, and I've never heard of rough vibrations at 1000rpm on those.
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