Put the new TAG in last night. I went for a test drive before and after just for comparison purposes. Man, what a difference. The turbo lag practically disappeared. There just aint nuthin quite like a Cummins!!! Anyone still sitting on the fence on this one should go ahead and get one. You won't be disappointed. I have plans to add stacks and an AFE air filter because I love the sound. I understand the TAG will cut down on turbo whine considerably thus negating (at least partially) the benefits of the stacks and AFE. My solution... I think I'll get an extra intake elbow that the TAG mounts in so I can swap back and forth. When I want the benefits of the TAG I'll put it on and when I want to be able to harass the tourists I'll put on the plain elbow. About a 5 minute swap. This is going to be fun. Aint life grand. Oo. Oo. Oo.