I Fixed the Military’s Biggest Mistake: Humvee Gets 500 HP

Head to https://drinkag1.com/murphysdiesel or scan the QR code to get a FREE AG1 & AGZ Travel Packs, Vitamin D3+K2, and AG1 Welcome Kit when you first subscribe. Thanks to AG1 for sponsoring today’s video!Go to https://murphysdieselstore.com/ to enter to win Fat Fanny Anny and The Brinkley!Wrecker Rick and the crew are back finishing our 12-valve Cummins Hummer build—a full diesel swap built with military toughness, fabrication skill, and classic mechanical know-how. This episode dives deep into the nuts and bolts of getting the 12V Cummins dialed in: pump tuning, boost adjustments, metalwork, welding, and all the gritty details that make a diesel rig battle-ready. It’s raw blue-collar diesel work, filmed right in the shop.After the final tweaks, we take the newly built Cummins Hummer out for its first test drive to see how this military-inspired rig handles real-world performance. From off-road capability to turbo response, we put the build through its paces and show what a properly tuned 12-valve can deliver. If you’re into diesel performance, heavy fabrication, military equipment, or mechanic life, this episode is packed with everything you love.