A couple months ago I purchased a 2006 grand prix base model, I wanted a gtp but I got a great deal on the base but w/e. there is only 1 exhaust but I was doing some reading about cold air intakes, will this k&n intake really increase my horse power??? Or since I only have 1 exhaust pipe would it be pointless..??? Help I want to hear that roar from under my hood. Is it worth the $ 300 bucks