Engineering the Future of Diesel Solutions

At the core of every FASS innovation is FASS Research and Development—a Missouri-based, industry-leading R&D team dedicated to engineering smarter, stronger, and more reliable diesel solutions.

From initial concept to full-scale manufacturing, FASS R&D is a true one-stop shop for product development, serving not only FASS Diesel Solutions brands, but also a wide range of trusted third-party partners across military, agricultural, and commercial industries.

Leadership-Driven Engineering Excellence

FASS Research and Development is led by a team of experienced engineers and innovators who live and breathe diesel technology:

• Spencer Ekstam – Owner & Director
• Josh Thornton – Lead Engineer
• Albert Ruck – Engineer
• Johnny Bauer – Engineer
  
  

Together, this team brings decades of combined experience in mechanical design, fluid dynamics, manufacturing, and real-world application testing. Their hands-on approach ensures every product is engineered with performance, durability, and longevity in mind.



From Concept to Production—All Under One Roof

FASS R&D manages the entire product development lifecycle, including:

• Concept design and feasibility analysis
• CAD modeling and simulation
• Prototyping and iterative testing
• Validation in real-world environments
• Full-scale production readiness
  
  

This vertically integrated approach allows FASS to move quickly from idea to finished product—without sacrificing quality or consistency.

Supporting Multiple Brands and Industries

While FASS R&D is best known for developing products for:

• FASS Diesel Solutions
• FASS Fabrication
• FASS EGR Solutions
  
  

The team also partners with third-party companies across demanding sectors, including:

• Military applications
• Agricultural equipment
• Commercial and industrial diesel systems
  
  

These partnerships rely on FASS R&D’s ability to deliver dependable, purpose-built solutions that perform in the harshest environments.



World-Class Machinery, World-Class Results

FASS Research and Development is equipped with state-of-the-art manufacturing and fabrication equipment, allowing precise control over every detail of the production process.

Our facility features advanced machinery from industry leaders such as:

• HAAS
• Mazak
• ACCURL
• Bodor
• And more
  
  

This investment in world-class equipment enables FASS R&D to maintain tight tolerances, rapid prototyping capabilities, and consistent production quality—all while scaling efficiently.

Engineering You Can Trust

FASS Research and Development isn’t just about developing parts—it’s about solving problems.

By combining experienced leadership, advanced machinery, and a fully integrated development process, FASS R&D delivers solutions that customers and partners can rely on with confidence.



Built in Missouri. Trusted Worldwide.

Proudly based in Missouri, FASS Research and Development combines Midwestern work ethic with cutting-edge engineering. Every product developed by the R&D team reflects a commitment to innovation, reliability, and real-world performance.

Whether developing the next generation of diesel fuel systems, precision-fabricated components, or advanced emissions solutions, FASS R&D exists to push the industry forward.