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      01-25-2020, 12:52 PM   #32
JasonC.E46
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Drives: 2012 BMW E92 M3
Join Date: Dec 2011
Location: Birmingham, AL

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Catless & Great Sound

I've been running catless X-pipes for 4 years (with the Epic tune). While I mostly drive with the windows up, when driving with them down I really don't notice much than a passing whiff.

If you're working in your garage (door open, of course) and have it idling, then you can smell the difference.

What I'm really surprised by is that no one has mentioned the sound difference, which is beautiful. At idle and low RPM (< 4k RPM) it is tame/normal. BUT, when you get on it and get in the upper RPM band, it makes a wonderful roar; far better than stock. As such, in town you can moderate your sound by your driving/shifting style (6MT FOREVER!!!) and then let her roar when you want to.

+1 to previous poster regarding making sure you can pass any emissions in your area, if applicable.
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