PLAIN AND SIMPLE,most vtech motors have 1 stage of vetech that rips at 5000 rpm,some gsrs have 2 stages of vetech,some people love it,honestly,the 2nd stage aint all dat badass,but its normal dude.I would go back to a ls/vetech bro,the ls crankshaft has more stroke than any vetech moter,including type r's,which means more torqe,the gsr heads have more compression than a ls head,ls/vetech,the best swap,and its cheaper