About Us

DMI & Bulldog are the racing component lines of Diversified Machine Inc. Started in 1991, Diversified Machine Inc. is owned by Jim and Tammy Haines. Started in a modest two-car garage in Lancaster, PA, together, Jim and Tammy began their journey. Jim was a certified tool and die maker whose early specialty was producing equipment in the food processing industry. In just a few short years, a 4000 sq/ft. building was purchased in Lancaster County, PA. And, before they knew it they had a few employees and a 2500 sq/ft addition. They incorporated the business in 1997.

Always a “motorhead,” Jim was introduced to sprint car racing by an employee in the mid-’90s. Then, a mutual friend introduced Diversified Machine to Weld Racing, and a business relationship was formed. For the next three years, DMI manufactured Weld Components and continued to grow.

In the summer of 2001, Jim recognized a need for high-quality components at a fair price, and the decision was made to begin the DMI product line. In July of 2001, Dave Ely was hired and assumed the position of sales manager for DMI Racing Components. The product line was displayed for the first time at the 2001 Performance Racing Industry show. By 2003, demand for the products was increasing and a new 66,000 sq/ft. building was purchased with a vision for the future. New products, more machines, and an increased workforce were part of the plan. Over the years, Jim’s innovative ideas along with his employees’ racing experience have helped shape one of the most extensive lines in the industry. In 2004, the decision was made to enter the quick change rear-end industry. In just a few short years, Bulldog Rears not only survived but thrived. Quite possibly the most difficult sector of the industry to break into, Bulldog has established itself as one of the premier rear end manufacturers in the world.