Driven To Be


The best in remanufacturing since 1974.

High-Quality Standards. High-Level Service.

There’s a big banner on the wall of our Tulsa, Oklahoma facility that says “Better Every Day.” It’s a reminder to everyone at Memorial Machine, from the owners to the janitor, that coasting just isn’t in our DNA. We continually push to improve, so our customers always get something a little extra with every Memorial Machine purchase: peace of mind.

About Memorial Machine

Founded in 1974 by Rex K Crumpton, Memorial Machine is a Tulsa Oklahoma based remanufacturer of natural gas and diesel engine components. Originally, he started as an automotive parts store and engine rebuilder. Migrating to diesel engines for trucking and heavy equipment. Now the focus is on natural gas, landfill gas and large diesel applications. Memorial Machine is the industry leader for quality repairs, customer service and timely returns.

Now in the second generation, sons Rex B Crumpton and Charlie Crumpton operate in three facilities, staffing over 100 employees.

Memorial Machine – Tulsa remains the Corporate office and main reman facility. Currently (Dec’22) under expansion, the Tulsa facility will be 66,000 sqft. The expansion will incorporate the most modern Cylinder Head Remanufacturing facility in the US.

Memorial Machine – Oklahoma City is quickly growing and has the same reman capabilities as Tulsa. With over 25,000 sqft and room to grow!

Memorial Machine – Bloomfield, while a much smaller scale, has most of the capabilities as the other shops and is designed to take care of localized customers in the area.

Memorial Machine continues to grow and develop year after year. With our Better Every Day initiative, we are always looking for the next best opportunity so we can remain the leader in our field.

Our Team

Rex K Crumpton


Rex B Crumpton

Vice Presiden

Charlie Crumpton


Kenny Keeter

Sales Manager

Jeff Stufflebeam

Tulsa Manager

Andrew Knox

OKC Manager

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