The Cummins Mustang is already crazy, but today we see if it can take every pound of boost the turbo can throw at it. From cold starts to full-throttle pulls, the engine gets pushed harder than ever.

Here's something nobody asked for, but now we can't get enough of -- a Ford Mustang with a Cummins engine. YouTuber Westen Champlin decided to do one of the craziest engine swaps ever when he put a ...