2001-2007 Chevrolet Express 4.8L, 5.3L, 6.0L and 8.1L Custom Tuning Tune Service:AutoCal Tune & Hardware [$749] 20-25ft-lbs of torque gains are

2001-2007 Chevrolet Express 4.8L, 5.3L, 6.0L and 8.1L Custom Tuning Tune Service:AutoCal Tune & Hardware [$749] 20-25ft-lbs of torque gains areBlack Bear Performance offers three different levels of custom tuning service for your 2001 2007 Chevrolet Express 4. 8L, 5. 3L, 6. 0L, and 8. 1L. We commonly see gains of 15 30hp, 15 20ft lbs of torque gains out of the 4. 8L 5. 3L variations and 6. 0L 8. 1L engines can see a monster 30 35hp+, 40+ ft lbs of torque, depending on fuel quality, octane and vehicle condition prior to the tune. Due to frequent issues with 6. 0L and 8. 1L vehicle sensors, we

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