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Modern Muscle! Great costumer service and quality work. I had headers and a tune done by Total Power in St. Charles and they totally F'd the tune. Modern Muscle fixed my tune, gave me a list of 15+ things that were wrong with it, and gained 35 RWHP from the original post header tune. They have an open house / dyno day on the 28th, they usually have a sale on parts and labor they offer during these as well. Cheers!
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