When General Motors decided to downsize to a 2.7L 4-cyl. engine in its ’19 Chevrolet Silverado and GMC Sierra, it needed to make sure the half-pint propulsion unit would be up to the fullsize pickup task. A key enabler turned out to be BorgWarner’s dual-volute turbocharger, a unique setup that sends alternating exhaust-gas pulses to opposite points on the turbine impeller, helping quickly achieve boost pressure and reduce turbo lag. “This engine was designed around the ...

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