R4Tech GM HD Lift Kit

6″ GM HD Lifted R4Tech Rear Suspension

Contractors who want their 2500/3500HD GM pickups to stand taller need look no further than the new Lifted R4Tech systems from Firestone Industrial Products Company.

The R4Tech system is a proprietary, hybrid air-over-leaf suspension system featuring Firestone Airide air springs, Firestone Ride-Rite air accessories and SANLUIS Rassin suspension technologies. 

Designed to replace the factory leaf spring suspension of all 2011-2013 Sierra/Silverado HDs, the R4Tech system comprises a high-quality Firestone air spring and SANLUIS Rassini’s leaf-spring suspension, positioned in a unique architecture to create a fully functional system that adjusts for varying load capacities.  
The Lifted R4Tech system is available for trucks with 6-inch front lift kits. 

The Lifted R4Tech system is rear-only, so enthusiasts will need to buy a front-only lift kit that will be paired with the rear Lifted R4Tech system.