’08-10 6.4L POWER STROKE
MAX HORSEPOWER: 550-590 HP TUNING: SCT OR MCC
Although the ’15-and-newer 6.7L Power Stroke is nipping at its heels, the 6.4L Power Stroke is still the king of tune-only horsepower. Compound turbos, a high-flowing K16 injection pump, piezoelectric injectors and a strong factory lift pump all play into this engine’s vast performance potential. This is the only Power Stroke that can double its power output with nothing more than a custom tune (280-290 hp stock, 550-590 hp tuned). Over the years, we’ve come across several custom-tuned 6.4L trucks that’ve dyno’d 550 hp but achieved trap speeds indicative of 580 to 590 hp while at the track.