The quality of the air intake is great and fits perfectly. There is definitely a noticeable change in sound and it’s fantastic. As for HP gain I'm not eactly sure however it does feel a little peppier. The instructions are easy to follow with pictures. My only thing is I wish the rubber pieces to go on the side of the heat shield came pre cut. It was not a big problem however it would have saved 5 mins. I would definitely recommend buying if you are in the market for a fantastic air intake. At first I got a another intake but returned it after some Fitment problems. If you are looking at another intakes and deciding if you should go AEM or another brand I would go for AEM.