What happens when you take a wrecked Mustang and decide to shove a 12V Cummins into it? Well, we’re about to find out! This might just be one of the craziest Mustang swaps ever, but first, we need to ...

From sketchy beginnings to stunning completion, the Cummins Mustang is done. Westen Champlin reveals the final product, a muscle car turned diesel beast, complete with fresh paint and brutal power.