Hey guy I am running a custom 3.5" full cold air intake system and its great. The company that makes it is now selling them on ebay. It sounds great and was easy to put in, the down side was the cost (380) but its really nice it came with every thing including the 3.5" maf adapter. No more rubber elbows or baffles. The thing I like about this one is that it is a full length system made of polished aluminum and it sound amazing.