Well, you will be happy then, as the OEM is uber quiet. Hopefully you will not miss the loss in HP, which it sounds like is not high on the priority list. The SRT is a more than adequate contender in it's stock form. You may want to see if you can find out if it had a custom tune and/or a performance pulley installed. If it had a custom tune, you may want to have the ECU flashed back to stock.