I just discovered on SEMA's website on NJ legislature:
Issue: Exhaust Noise
Bill: AB 3738
Status: Active
Location:
Description: Requires aftermarket mufflers to be certified to operate at certain noise level; Dept. of Environmental Protection to establish standards
Author: Assemblyman Gordon
Intro Date: 24-Jan-05
Bill Type: Two Year Bill from 2004
that's all they really have listed relating to exhaust.
In terms of magnaflow, this is what's on their website...
http://www.magnaflow.com/07techtips/faq/question09.asp
I guess I should print that out?