depends on the car...on the 6th gen 4cyl F23A1 the V2 is lightyears better than the original...the original made the car slower cuz u lost ALLLLLL low end and gained a little up top. The V2 gains the whole way. I waited for the V2 after i saw how whack the first one was when my boy john got one for his accord. With just the V2, GReddy EVO cat back, and DC 4-2-1 header i noticed a BIG difference...if im rolling at about 10mph and give it some gas it'll spin the tires...i drive stock 6th gen 4cyl's all the time ( im in sales at a dealership ) and they have no get up at all compared to mine. From a stand still i will spin tires easy, i cant get a stock one to do it without some trying. And as for a V3, that seems kinda stupid considering the V2 hasn't even been released for every application yet...if u're gonna wait for a V3 considering how long it took the V2 to come out even after it was announced publicly, u better start planning to put it on your next car lol