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I would say HP Tuners for sure, my truck gained 150hp from a Smarty SSR. Who you use is up to you and who you think has the best customer service/tuning capabilities.
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@bodie_armstrong
2003 2500 4x4 auto FOR SALE
2005 2500 4x4 auto Drag Truck
2013 3500 4x4 Aisin Dually Tow Rig
Tenacity Tuning, Longs Machine Shop, BD Diesel Performance
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