i just bought a dyno jet on e-bay.... does it really increase horsepower that much?? and is it even worth $50??

 

the needle is what makes that kit unique...it is longer and tapered more than stock.

Will you really get a big power increase? Not so much as to make a huge difference...you may find the throttle response to be better or more linear.
I see in your signature that you have a pipe on it now? IS it jetted for that pipe? If it is..then you will probably see little to no change seat of the pants power.

 

i dont think its jetted for the pipe......

 

My GYTR kit was definitely worth the money.