uprev osiris standard vs uprev osiris tuner. The tuner version lets you tune it on your own, the standard version only a shop is able to tune it. Price difference is 500 vs 700 straight from uprevs site. If youre looking to get a shop to tune, standard is all you need. Most people i think that go with tuner know how to tune it on their own and probably constantly change their mods up. At least this is what i have heard/know of. Hope this helps. And thanks, i hope i find one soon.