Air suspension system for Ford F-450


Improved ride with variable spring rate to stiffen when the truck is loaded and soften when unloaded

INDIANAPOLIS, Ind. (September 12, 2012) – A new Firestone Industrial Products Company, LLC R4Tech air suspension system is available for 2011-2012 Ford F-450 4WD Long Bed trucks (part # W287600147).

The R4Tech kit is a hybrid air/leaf suspension system designed to replace the factory leaf spring suspension. It delivers an improved ride at all times by using the variable spring rate of the air spring to stiffen when the truck is loaded and soften when unloaded.

Featuring Firestone Airide air springs, Ride-Rite air accessories and a SANLUIS Rassini leaf-spring suspension, the R4Tech kit creates a fully functional system that adjusts for varying load capacities. It also improves headlight aim and driveline angles independent of load conditions, and delivers improved towing effectiveness.

The complete R4Tech system comes with the Rassini foundation suspension – including leaf plates, lower trailing link, J-spring, spring perches and mounting brackets – the Airide air springs and an air compressor control system that maintains the proper air level in the spring for the exact load you’re carrying. Professional installation is recommended for R4Tech systems, which easily install using the same factory holes as the OEM leaf suspension.

Trained technicians are available toll-free (800.888.0650) to answer any product application, installation or warranty questions Monday through Friday from 7:30 a.m. to 4:30 p.m. EST.
About Firestone:
Firestone offers a line of Complete Suspension Solutions that includes Ride-Rite, Sport-Rite, Coil-Rite and Level-Rite air helper springs; Work-Rite load assist springs; and the R4Tech hybrid air/leaf suspension system. These products have become synonymous with quality, durability and outstanding customer support. For more information, visit

Firestone Industrial Products Company, LLC specializes in air spring manufacturing and technology with a history of more than 75 years of research and development of technologically advanced air springs for the global marketplace. With headquarters in Indianapolis, Ind., and quality-certified manufacturing/assembly plants and technical centers throughout North America, Latin America, Europe and Asia, the company produces suspension products for commercial trucks & trailers, cars, sport utility vehicles, light trucks, minivans, vans and motor homes. Firestone facilities are ISO-14001, ISO-9001 and TS-16949 Certified.
About SANLUIS Rassini:
SANLUIS Rassini is the world’s largest designer and manufacturer of leaf springs for light vehicles, a leader in the NAFTA and Brazilian markets, and also a key designer and manufacturer of high-tech brake system components in North America. Its components are used in different platforms, such as high performance options as well as light and commercial vehicles. SANLUIS Rassini has seven production sites strategically located in the U.S., Mexico and Brazil; a technical center in Michigan; headquarters in Mexico City; and liaison offices in Stuttgart, Germany, and Shanghai, China. The company is ISO/TS-16949, Clean Industry and ISO-14001 Certified. For more information, visit