Check this out!!!!!!!!!!

if you are doing a top end rebuld ok, only thing really worth anything is the pipe.....idk how good the bills pipe is tho.....
 
save your money, but a better pipe. reed spacers dont do anything but help with clearance issues. diferent reeds help out a bit, esp dual stage reeds. there are a ton of better pipes. you are better off paying fora better pipe in the long run. esp of you wanna do porting...

i hate seeing "jet kit" its not a mod, its and adjustment to make it run rght with a different air filter or pipe....