Russ Flagle, the owner of Indy Cylinder Head, was kind enough to sit down with us and explain the ins and outs of his brand-new D12 head for Cummins 12-valve competition engines. A stock 12-valve ...

Even though the design of the new 6.7L Power Stroke and Cummins are fundamentally different ... and reverse-flow cylinder heads are a first in this segment. However, these are only the most ...

Diesel engine manufacturer Cummins, together with Tula Technology, will test out a six-cylinder semi truck diesel engine, outfitted with a cylinder-deactivation system dubbed Dynamic Skip Fire.