2 steps up from stock?? never heard that one. as for it "kicking-in" usualy a cam will sound more choppy when engine is cold started and "smooth" out a tad when warmed up. if your car starts shaking and rpm's surge then i'd think that something isn't right when car get warmed up. your running and electric fan?? does it have a manual switch you can turn off till you need the fan running?
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