Hey all, ok basically i finally got the epa notice, massive depressed over this thing.... since it was a mates fault, **** sucker... im not gonna go into details, but anyways, the rules are if the car is below 98 decibels its okay, now the thing is at what do the test the sound readings at?

At what rpm do they go up to before backing off? im just considering my options atm, as i dont wanna take off my catback... if its below the level, than ill just leave it on