Duramax Tuner. is a data driven, market leading tuning business. We are dedicated to providing high-quality engine calibrations that represent the best mix of drivability, reliability, and power available within the performance automotive aftermarket. We keep our edge by encouraging innovation. We drive and verify results by employing expert staff, who are equipped with the best tools in the business. We view ourselves as prompt, reliable professionals who deliver. Duramax Tuner aims to establish a nationally recognized standard in our market for product quality and service delivery.