I have an 04.5 3500 and used the Puck for a time with my Juice. It worked together very nicely, but seemed a bit light on the top end, very good down low though.

This might be a question of extreme ignorance but I have to ask before I try them. What exactly would the difference be between the Extreme RKL puff tune w/ no timing added and the Extreme RKL puff stack tune w/ no timing added. Neither of them have any timing. Just wondering which might be better ...