Be aware that Seattle just passed a new noise ordinance that will technically make the exhaust on every stock Challenger illegal (as well as most cars ). If you live in or have to drive into Seattle city limits, be aware! The Seattle Police Dept has been sharing this on Twitter- "If we can hear your vehicle from 75ft away, you could be subject to a $136 fine." I think that this will be challenged in the court. If you have OEM, non-modified exhaust how can Seattle pass a law that override s federal law?