It's no secret that two turbos on a diesel engine are significantly better than one, but the problem is getting an extra turbocharger to fit. The six-cylinder Cummins engines have lots of space in the ...

GM Powertrain's powerful Duramax 6.6L V-8 turbo-diesel engine is revised to meet new, stringent 2007 federal emissions regulations and continues to deliver the outstanding power and torque ratings ...