I having two options. I have a Union Bay head or a rkt drop in kit. Which one is the better of the two. I have a stock 2001 800 twin motor. I have a friend who has the rkt drop in kit in a motor that he wants to swap for my motor due to elevation change He is at 4000ft to 5000ft. I have a union bay head to put on my motor but this other option cam upon me. What would you do in this case. please let me know need some answers.
