i just finished my modification. and now i confuse to buy launch control, because my EMS is link. there is no option about launch control. can u suggest what kind of launch control i must buy and what brand? and how hard to plug it....? thanks......

You mean something that will cut spark at a certain RPM?

MSD ignitions have some that have a two step, meaning a stutter box like heman is thinking of, but there is no "launch control" like BMW M3s have that you can get iirc

i mean launch control like on the autronics or hks fcon v-pro.

how does that work, what does it do?

starting for drag race..... like on autronic or hks..... but my ems didn`t have that feature..... it kept on the rpm we control.......