We're Your Trusted Partner for Engineering, Compliance, and Manufacturing

Transfer Flow delivers more than fuel tanks. We provide complete OEM engineering and manufacturing solutions designed to help customers bring products to market faster, more efficiently, and with confidence. From concept development and prototype design to production manufacturing, compliance testing, and final integration, Transfer Flow partners with OEM customers to create custom fuel systems and vehicle solutions tailored to their exact requirements. With advanced manufacturing capabilities, regulatory expertise, and decades of experience, we help OEMs reduce complexity, maintain quality, and scale with confidence.

Engineering & Product Development

Transfer Flow works alongside OEM engineering teams to develop custom solutions from concept through production. Their capabilities include:

• Fuel system design and integration
• Mechanical, manufacturing, and mechatronic engineering
• CAD and SolidWorks modeling
• Prototype development
• Design for manufacturability (DFM)
• Validation and production readiness support
  
  

Custom Fuel Systems & Vehicle Integration

Transfer Flow develops complete systems—not just tanks—including:

• Custom fuel tank systems produced at volume
• OEM fuel tank relocation kits
• Fuel and brake line assemblies
• Fuel system components
• Fuel tap kits
• Retrofit filler neck solutions
• Side-entry and rear-entry vehicle conversion systems
• Floor, ramp, and structural assemblies for specialty vehicles
  
  

Advanced Manufacturing Capabilities

Transfer Flow supports OEM production with:

• Robotic welding
• Precision press brakes
• Fiber laser cutting with automatic stacking
• Tube forming and metal fabrication
• Repeatable production processes for consistent quality
• U.S.-based manufacturing in California and Tennessee facilities
  
  

Compliance, Testing & Certification Support

One of the strongest OEM advantages is helping reduce regulatory burden:

• Hydrostatic pressure testing
• Drop testing
• Independent crash testing
• FMVSS 301 crash testing
• CARB and EPA compliance experience
• LEV III certification support
• DOT-related fuel system compliance expertise
  
  

OEM Markets We Support

Transfer Flow has experience supporting:

• Motorhome manufacturers
• Bus manufacturers
• Van conversion companies
• Mobility vehicle builders
• Work truck manufacturers
• Fleet and commercial vehicle programs
• Truck and van upfitters
  
  

Why OEMs choose Transfer Flow

• 40+ years of manufacturing experience
• Custom-engineered rather than catalog-only solutions
• Production-scale manufacturing
• Regulatory and certification expertise
• American-made manufacturing and supply chain support
• One partner from concept → testing → production → launch