FAT (Forced Air Technologies) kicks ass.
2831 West Weldon Avenue Phoenix, AZ 85017
(602) 993-3288
Goodspeed is good. Clark Turner does tunes there.
15001 North Hayden Road Scottsdale, AZ 85260
(480) 747-6150
I had my DSM when I lived down there- so of course UMS Tuning was my choice.
1716 West Broadway Road #115 Mesa, AZ 85202
(480) 446-8863
If you're looking for local community, check out www.AZAWD.org