Ok all. After a complaint to EPA, I've received the following test specifications for the e92 M3. It'll come in useful if you ever get pulled up and the stupid testers don't know squat about M cars.
Maximum Permissible Noise Level: 92db
Tested at: 6225 rpm
As the e92 M3 is designed to meet ADR83/00 noise limits, it also allows for a 5db(a) tolerance for exhaust system deterioration.
BMW E86 Z4M MY07 - IB | ACS Carbon Rear Diffuser | ACS Sport Exhaust | ACS Rear Wing | GruppeM CAI - SOLD
BMW E92 M3 MY08 - AW | Akrapovic Evolution | aFe CAI | SBM Tune | Black ZCP | CF Details - SOLD