Rocket key sounds good, but does no good. If you want more power, get a walbro carb, a tuned pipe with a fat expansion chamber, big sprockets for low end torque, or smaller sprockets for top end, then you can port and polish your motor and run high octane gas. A rocket key does no good. The name plays tricks doesn't it.
i'll be testing my this weekend, but it's cheap and doesn't add alot of mph's like only 2-4, so it's not the same power gain as an exuast or carb, so keep that in mind, also it's only like 15 bucks, so that a nice little mod thats cheap to get a little bit more power. But don't go into it thinking it's going to night and day
maybe i should have listed the mods i have made already.i have a vstack and filter ,tuned pipe from oneil bros,walbro wt603 carb, and the ada juicebox. i bought the whole kit from oneil bros and it came with the rocket key too, so with those mods will the rocket key be a good add on
One more note, a rocket key advances the timing but what good does it do if you dont have a ported engine. There's also timing in how the head is ported. If you have a head that is ported wrong with bad timing and you have a rocket key that advances timing, what do you think you get? You get smoked