Hi Matias, it is a bit loud with the APR downpipe to be honest. There isdrone around 3k rpm till 4.5k rpm. In the future I am going to put on the APR front muffler/resonator that is available for their exhaust system to quiet it down. "Derushi" here on the boards has done this and has mentioned that the APR front muffler has effectively taken out the drone from the css muffler combined with a downpipe. You could also pick up a vibrant resonator to replace the stock resonator to help cut out the drone, it is also priced less than the APR unit.
Hey! Thanks for all the info too, I love your car bro.Maybe cts catted instead of apr dp will do the trick? I don't want to drop my CSS Muffler.