I got to test my mod's on the Highway and I think I'm addicted to the Trackey now. I was sceptically before the mods but the sound and responds at WOT is addictive, and decell is grin inducing to say the least. I may not have gained a mechanically measurable hp but this thing zips along quite nicely. I'm waiting on my cat delete legs to see what that will do. I have a feeling I my be keeping the side pipe closed until I'm on the highway.