DynoSource Performance is a reputable shop for car tuning needs. Harold, a knowledgeable and skilled mechanic, provides top-notch service, fixing mistakes made by other shops and improving car performance. He has expertise in a range of applications, from 4-cylinder to big block, and offers custom upgrades, such as adding 40 horsepower to a Trail Blazer SS, with noticeable improvements in drivability.
Harold was very efficient in getting me in way before I thought possible. Tuned and swapped out bad injectors for me. Car runs TOP NOTCH now thanks to DynoSource Performance. Would not hesitate to take next project to them.
March 2024
Put headers on my wife's trail blazer SS and Harold was able to add about 40 horse (350 wheels) plus way better drivability compared to stock. Hope to be back after more upgrades.
August 2023
Harold and his guys did some turbo work for me on very short notice w a good turn around time. His shop outputs some really nice work
