Ford's 7.3-liter Power Stroke made 250 hp and 505 ... freer-flowing turbo inlet reducing intake and exhaust pressures. The LB7 was also the last Duramax not to run a diesel particulate filter ...

This makes it a popular engine for diesel fans, as emissions technologies such as exhaust gas recirculation ... such as the LBZ Duramax beyond the identical bore and stroke.

Ford certainly has the upper hand as the all-new Power Stroke 6.7-liter has plenty of potential left in it, while the 6.6-liter Duramax is a revised version of an older engine design and has used ...