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TestimonialsIm Very Happy with my tune as well as your customer support. All of my questions have been answered quickly and any issues resolved. The tune was installed just after the 60,000 …I have a 14 chevy impala. The tune is very fairly priced for what it provides. Id say there is at least a 5-10% difference in power, the throttle response doesn't lag as hard an…Well it's been 2 years with the tune. 1 year on e85, haven't had 1 problem. Just got back from a 800 mile trip. Had to switch back to 93 mid trip. Because I couldn't find e85. …Amazing, One of the best upgrades I have done with my truck.