If you could only do one mod what would it be? I have to say that the works short shifter kit has to be the single best mod you can do. I got mine put in yesterday and it feels like a new car. I absolutely hated the way the stock GSR shifted. Best money I have ever spent. This is a must have!

 

A tune.

 

Absolutely a tune.

 

tune for sure...but a nice weighted shift knob can/will make more of a difference than a short shifter