stevensGT145

i have a 02 GT and i just bought the U7146 diablo predator tune and instead of just putting on the preprogrammed tune i was wondering if any one out there has a tune like this to where they moded it so its better the what it is like with the spark plug mod more retard or advance etc with the other stuff if you guys can comment back or email me @ stevenispnut@aol.com and give me some numbers that that be great thanks!