I have a kkm and to tell you the truth I wish I hadent bought it. Iwish I would have gone with either sho-shops cold air, or and maf adapter and a k&n conical. Also I have e-mail Demon on this topic and he said that the kkm acually collapses above 6K rpms in some instances causeing a big loss in Tourque and HP. Just my $0.02