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With more then 350 dealers through out North America, Diesel Spec can offer you support no matter where you are… Don’t be fooled by those repair shops offering inadequate low priced tunings with no support and offering no warranty that can have you spending tons of money trying to solve problems they created…

Since 1987, Diesel Spec has been an industry leader in diesel engine tuning. Our sophisticated ECM tuning tools are among the most efficient on the market and are sold across the world. Through our cutting-edge services, we ensure the optimal performance of diesel engines and fuel economy and offer the best warranty on the Market. Call Diesel Spec Today!!