Is there anyone out there who is running one of these with moderate boost levels, say 7-12psi. Did you notice a difference, basically was it worth the money? Also did anyone also buy the MSD coil pack?

i have one with the coil pack
i like it

i like the stutter box
i like the the fact that i can set where the rev limit is

so far at 18psi my timing has been 17 degrees

so i guess it was worth it