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GAFFNEY, S.C. (May 30, 2026) 鈥� Freightliner Custom Chassis Corp. (FCCC) and Cornerstone Luxury Coach celebrated the introduction of a new standard in luxury with the unveiling of the Series 6 Class A coach at the 2026 Music City Motorhome Expo, taking place May 29-June 2 in Nashville, Tenn.

Leaders from both companies were on hand to debut the 2027 645D, the first product from Tiffin Group鈥檚 reimagined and expanded Cornerstone Luxury Coach brand. It is built on the Tiffin-exclusive PowerGlide庐 SL chassis with a super raised-rail, offering confident handling, a composed ride, and state-of-the-art standard features.

鈥淧artnering with Cornerstone Luxury Coach on the development of the new Series 6 has been amazing,鈥� said Jeremy Buckmeier, RV product manager for FCCC. 鈥淚t鈥檚 an honor and a responsibility to help the team bring this new luxury brand to life and provide owners the highest-quality RV experience we can. For the Cornerstone team, our legendary service expertise, network and availability 鈥� combined with our comprehensive focus on the ownership experience across the life of the coach 鈥� were key factors in partnering on the development of the Series 6.鈥�

Underneath, the 645D is powered by the Cummins X15 engine offering 605 hp and 1,950 lb-ft of torque, as well as high-quality, world-class components like  the PowerDrive steering column, Allison 4000 MH automatic transmission, Koni custom-tuned shocks, Bendix air disc brakes with ABS, and ZF Independent front axle.

It also comes standard with the range of FCCC鈥檚 5-Star features including:

• 24/7 factory-direct infinite support
• More than 450 Freightliner-branded service centers, including Oasis and Elite
• V-Ride single-axle rear suspension rated up to 24,000 pounds
• UltraSteer fully integrated and precision-tuned tag axle
• DriveTech ergonomic driving system featuring the OptiView all-digital gauge display

Inside, the 645D offers sleek design and high-quality amenities. The coach鈥檚 True-Frame wall construction provides a stronger, quieter, and better-insulated structure鈥攔eflecting Cornerstone鈥檚 commitment to durability and longevity that reveals itself over years of ownership.

鈥淭he new Cornerstone Luxury Coach speaks to an experience beyond the destination - where intention, craftsmanship, and care shape the journey long before it begins, said Joel Grimm, vice president of sales for Tiffin Motorhomes. 鈥淭he Series 6 represents everything we鈥檝e envisioned with the new Cornerstone Luxury Coach. It offers timeless features and residential touches in every single detail and is designed to embody individuality, presence and refinement 鈥� to provide a personal sanctuary on the road. We are proud to partner with FCCC on the development of this amazing coach.鈥�

Cornerstone Luxury Coach is producing only 24 units of the 645D for the 2027 model year, allowing each one to be crafted with greater attention, discretion, and care. Models are expected to be available for order immediately for fall 2026 delivery

All FCCC RV products come with industry-leading safety features and are backed by a comprehensive service network featuring 24/7 Factory Direct service and support with access to FCCC鈥檚 nationwide service network, including more than 450 service centers and 100-plus RV-centric Oasis locations. Every PowerGlide chassis comes with a five-year, 100,000-mile warranty. 

About Freightliner Custom Chassis Corporation (FCCC)

Freightliner Custom Chassis Corp. (FCCC) is a leading manufacturer of diesel chassis for the motorhome industry. FCCC supports its industry-leading chassis with a comprehensive suite of services, including 24/7 factory direct support, a nationwide service network with more than 400 dealers in the U.S. and Canada, and an official customer-support mobile app. FCCC also manufactures chassis for the work truck, walk-in van, school bus and shuttle bus markets. Freightliner Custom Chassis Corporation is a subsidiary of 51直播, a 51直播 company. For more information, visit fcccrv.com or call 1-800-FTL-HELP.