I don't like Keith at AZ Dyno Chip. He says he will do things and NEVER does it. Devin, at PSR is the only tuner allowed to tune my car. His tunes are spot on. PSR is still in business. They are located near 25th ave and Sherman, just north of Buckeye. Their number is 602 269 8955. That moron that said that PSR is shut down, is probably just another AMP Fan boy.