Hi I don't know if you remember me but I commented about 2 month ago I just wanted to ask did you do anything special to the quad because yours sounds more aggressive but on different videos it sound a little weird I want mine to sound like yours. Did you so anything special?
How to install the Power Box? It's my buddies wheeler but I can try to sometime. It comes with instructions and here is some info www.biggunexhaust.com/power-box-101/