Im looking at Uni-filter, kn w/ pre filter, and twin air filter. Just wondering which is the the better value? How well does the UNi and Twin air do being foam filters, they seem to be the cheaper and have notice that a lot of you have UNI-filter. I will be running a HMF utility exhaust, and a dyno jet kit with probaly the UNI filter, what jet do you run? Would it be same as the KN? Any opinions will help. thanks