I plan on ordering a 4# lower with a diablosport in the next week or two. I will be using the canned tune for now until a get a few more things done then I will get a dyno tune probably in the fall. My only other power mods are a CAI and C&L powerpipe. The only other mods I am planning are a SBTB and maybe an upper intake plenum. Will this set of mods put me anywhere near the range that I would need a new MAF sensor or an extender? If there is any risk at all I'll probably go with the SCT big air. Anybody have any experience with them? A guy I ran into with a 670RWHP turbo Maurader was using one and he said it worked well for him.