Hitting v-tec at 4500 will not benifit you in any way. If it is all stock head, it is meant to hit at 5200, therefore making the power range alot smoother and better. When honda made the motor, they made v-tec hit a 5200 for a fucking reason. then ricers go out all full of vtec bandwagon bullshit, and get there vtec lowered. fucking retarded.
Also a jdm gsr is the exact same as a usdm gsr. NO stock gsr hits v-tec at 6500 from factory. and why would you want to rev past 8000rpm. you don’t make power after 7800. and much more power? would yu care to show a dyno chart with comparison to 4500, and 5200 which is stock?