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Maddog Diesel Performance & Racing
Maddog Diesel Performance & Racing
1119 E HIGHLAND DR # 1
ST GEORGE, UT 84770-3043
Phone: 435-986-8442

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REPAIR MAINTENANCE UPGRADE
One-Stop Performance Shop


Right here in St. George you can get “Maddog” expertise in power, mileage, and performance, no matter what you drive. Just come in and ask, it’s that easy. At Maddog, WE KNOW PERFORMANCE.
Richard “Maddog” Madsen is a pioneer in the Diesel Drag-Racing World. Year after year he has set records with his Cummins-powered crew-cab F350. His 7000lb truck does a low 10-second 1/4 mile at over 130mph pushed by over 1000 horsepower. The same truck is a daily-driver and gets 15mpg at 75mph!
At Maddog YOU can find the latest in exhaust systems that are both beautiful and functional. An MBRP exhaust system, for example, can reduce back pressure, reduce engine temps, and improve mileage. Add a nice chrome exhaust tip of your choice for looks to match performance!
Maddog knows the best way to chip your stock computer to get up to an extra 100 horsepower at the touch of a button! Or pick an economy setting to save gas, or a towing setting to get extra performance for those vacation trips.
When it comes to HUGE horsepower increases; fuel pump, cool air intakes, turbos, injectors, or any other upgrade, no one knows better than Maddog! If nothing else, you should see the beautiful world record-setting F350 with huge dual-turbos, wastegates, and over 1000 horsepower! Come in a look around at all the fun here on 1119 E. Highland here in St. George. At Maddog, We Know Performance!

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