Thanks for the response. It's an '04 600. Picked it up April '04. Build date is Jan '04. He was wondering about the 3 levels, compared to my 4. He's running EZ on 3 (highest) and Juice on 5 (highest). I keep saying don't do it. He's already hearing a ticking sound and it's been 4 days. What do you think the ticking sound is? Is it more beneficial for him to ditch the EZ and send his Juice in to get the Hot Juice? I'd think this would make more power anyways. Thanks.