thinking of getting one a little down the road for one of the LT80s, I have FMFs now and hear they're pretty much just midrange power, not sure what the Trinity stg4 is for LTs but even high rpm is good since they're CVT... LT80/Jack Moore recommends them over every other pipe for LT80s/KFX80s and he's the guru for them pretty much as far as porting and making them fast...