ive had a skunk 2 cat back and a now i have a apexi ws2 and im completly in love with it now rather my skunk2 the skunk2 sounded great and was loud with a deep tone but on the highway couldnt talk on the phone nor talk to the person in the seat next two you but now that i have a apexi you can talk to whoever where no matter what rpm's your at it great so id go with the apexi