This slip on is awesome. Gave quite a bit more horsepower and torque in the higher rpms. Durable as well. I love it. When installing it, it didn't exactly "slip-on" but it went on pretty easy. Just had to wiggle it to get it to slide on. I got it because I was wanting to get something aftermarket like the exhaust, plus I was tired of looking at my ridiculously long stock exhaust. Glad I got it!