Freightliner Custom Chassis Corp. (FCCC) announced a new collaboration with Roush on the development of the next-generation 6.6L gas engine at Work Truck Week 2026.

Through the new agreement, FCCC will work with Roush Power Systems, a recently formed division of Roush, to integrate the new GM 6.6L gas engine into its chassis products across a range of applications and markets. The exclusive agreement will ensure these new engine products are designed to meet future requirements for emissions and engine compliance. 

“This partnership brings together two of the most respected and renowned names in commercial innovation and expertise,” said Akbar Ghous, Vice President of Sales and Marketing for FCCC. “And it signifies our tireless commitment to the walk-in van market, while also providing us the enhanced ability to explore the deployment of this engine in additional vocations moving forward.”

By combining world-class powertrains and FCCC’s legendary chassis with Roush’s decades of engineering expertise, the team will deliver turnkey-certified power systems for a range of applications, including walk-in vans, shuttle buses, and trolleys.

“We’re thrilled to continue growing the capabilities and impact of Roush Power Systems,” said Tom Patterson, General Manager for Roush Power Systems. “Our development agreement with DTNA proves that we are uniquely positioned to support industry-leading OEMs and scale new trucking solutions in global markets. As we celebrate our 50th year as a company, our goal is to build on Roush’s legacy of delivering commercialized solutions and empower innovation over the next 50 years and beyond.”