It practically goes without saying — big trucks require powerful engines, and that’s exactly what the Detroit DD15 engine promises to deliver. The engine was introduced back in 2007 after a nearly five-year-long development process costing $1.5 billion. The Detroit Diesel Corporation was the brains behind the six-cylinder DD15, and while the price tag for producing the engine might seem high, the results speak for themselves — which isn’t a surprise, considering the company is known for making some of
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