Spelab diesel performance products help improve airflow efficiency, exhaust dynamics, and system durability under demanding ...

If you’ve been following along the last three months, you’ll know we added head studs, hybrid injectors, and custom tuning to our ’97 F-350 in the May issue, replaced its up-pipes in June, and added a ...

The best ways to add power without killing fuel economy. by G.R. Whale Campfires, coffee pots and canned beverages frequently trigger debate about what works best, inevitably leading to a ...

Foreign automakers would love to tap into the lucrative market in the US for full-size half-ton pickup trucks, but the Detroit brands have kept this market to themselves—a three-way battle for ...

In the coldest corners of the map, where diesel engines have long been treated as the only reliable option, electric vehicles are quietly rewriting the rules. Real world testing from Arctic truck ...

For Part 3 of our Serious 7.3L Upgrades series, we found ourselves beefing up our ’97 F-350’s automatic transmission. How long your E4OD (’94½ to ’97) or 4R100 (’99 to ’03) transmission lasts behind ...