I have a diablo sport revolution chip that can hold two different tunes and you can switch between the two tunes + your stock tune. SO basically you have 3 options for tunes with one chip. The switch is NIB. the chip i used in my '03 4.2 STX. The code it is tuned for is YAH1. THe chip currently has only one tune on it. You can get it tuned with 2 tunes from anyone that programs diablo products. I would like to get $75+ shipping. THanks
