3.5 out of 5 Overall amazing results! Sounds great, kit has everything included, and comes with instruction, Took like 4 hours to install. For the p3 model 12 s60 instructions did not match the car had to look up a YouTube video to remove the air box. Two things to know for purchasing. You have to drill to into the part of the car to hold the ECU. The connectors from the turbo pipe NAS air filter to the air cold air intake is very tight like very and was difficult to put in place. Reminder to disconnect the battery this was not said in the instructions.