Ive had big boars in the past and l have a stage 3 Bikeman kit now on my Axys RMK and loving it. It has tons of power down low here in Michigan and I just spent 2 weeks out at 10,000 to 12,000ft out west and it still ripped! Im very impressed and happy, but Id be lying if I said it had the same power as a turbo at high elevation because nothing does. With that said I was high marking up there where they said "only turbos go", I made it, maybe not as fast as they would have, but its been bullet proof which means a lot to me. Oh, and I run straight pump gas everywhere.