Awesome Diablosport Predator 7193 engine tuner for 03-05 chevy Trucks and 04 Corvette. You can choose from 87 octane up to 93 octane tunes, adjust tire sizes for speedo, adjust transmission shift points, and it will also read trouble codes for check engine. You will gain 15-25 hp and you will notice an immediate difference in power in 5 min. $125
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