[amtk2007]

Hello all!

I am contemplating getting a qtp exhaust cutout for my M3. For those of you who have this installed, what are the benefits and drawbacks? Is there any maintenance required for the valve. One more question: What size is our exhaust diameter. As I've scoured the threads, I see mixed results ranging from 2.5" to 3". Which size should I order?

I'd love to get everyone's opinion before making this purchase and install.

Thank you!