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From: Marlton. Increasing performance one speeding ticket at a time! NJ
I'll agree with everyone else here, a pro tuner will give you much better results.
If your really into DIY mods, and seriously want to learn all there is about LSx engines, don't even consider the Diablo. For just a little more, you can buy a full suite of HP Tuners, and be able to tune 3 of your friends cars too.
I used the Diablo on my 2000 MN6 only mods are X pipe, VRB2, ported throttle body and Z06 exhaust. I really did notice a difference in performance with the Diablo. I really like it. If I go any further with the mods then I would go to a tuner but for now I think the Diablo is great. I purchased mine used on the Forum for $225.00.