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Mark and Gina Chapple, owners of TST Products, Inc. promise "more power in about an hour."
TST designs, manufactures, tests, and markets power upgrades for turbo diesel engines used in many Dodge, Ford, and GM pickup trucks, motorhomes and medium trucks, plus heavy trucks with Caterpillar and Cummins electronic diesels.
The business was founded in 1995 by Mark Chapple, a former Cummins engineer with 33 years of service. Mark and Gina sold their first parts at a diesel rally in July 1996.
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