Hey there, we're the Yup Boys!  We're four brothers who came together here in Southern California to revolutionize the diesel industry.  We focus on high-performance and attention to detail. Each of us has our own niche, whether it's tuning, maintenance, or custom builds. What unites us is our shared commitment to quality work and customer satisfaction. 

Join us on this journey as we make your dream build a reality. 

Our mission is simple, to create a brand and lifestyle that will last longer than us. We can't wait to show you what we're all about!