Wanted to let you guys know I came across this very accurate and consistent Db meter on my iphone. I think this is a great way for us to help choose exhausts for those that are concerned with drone or highway noise. The app is 99c and is called SPL Meter.



This is my 6spd G35 at 75mph with cruise on. Stock exhaust with resonated test pipes and HR y pipe.



I want to go nismo catback or TDX2 with art pipes, but if people could install this app and upload highway and acceleration max Db it would be a great exhaust selecting tool!