thanks dale. If you want to be exactly 90db go down to Daalder Exhaust in BoxHill. Ive installed their 'special' resonators and now the car is much quieter, less dronee noise in the car as well. Oh btw if you ever get busted for epa testing even with the 'special' resonator, go back down to Daalder Exhaust as they are epa testers as well and can pass you straight away.