When it comes to making your diesel perform, Bully Dog has you covered! Bully Dog kits and components are what you need to wake your diesel up and give it enough power and torque to make the earth rumble. They are well known for innovative diesel performance products. You'll know why they're so popular when you try one! Bully Dog will make your truck the baddest on the block. Bully Dog performance programmers, exhaust systems, cold air intakes, gauges & pods, transmission upgrades, mechanical upgrades, and nitrous kits are all in stock at JEGS. We offer super low prices on Bully Dog parts and most are ready to ship today!