Just wanted to chime in, for '6500rpm'
I would talk to the people who tune there cars (AJPTurbo, Torrie, LME) - AJPTurbo has already chimed in, and ask why they tune for meth, what changes are made etc.
As AJPTurbo has already said, there are some fueling changes that need to be made to run meth, for the car to be somewhat driveable. I would say Meth=Tune as stated by others, otherwise, there are some mods you can do without a tune (small E content to the tank, a few bolt ons, etc.)