Timbren Industries FRTT350J Rear Suspension Enhancement System for Ford Super Duty

The Timbren Industries FRTT350J Suspension Enhancement System is a rear suspension upgrade designed to eliminate sag, reduce sway, and improve stability when hauling heavy loads. This severe service kit features Timbren's patented Aeon hollow rubber springs that automatically adjust to uneven loads and road conditions without requiring any maintenance or adjustments.

Key Features:

• Patented Aeon hollow rubber springs with progressive spring rate technology
• 8,000 lb load capacity for heavy-duty hauling applications
• Single-convoluted spring design for aggressive weight resistance
• Laser-cut, precision-bent, and powder-coated steel brackets for quality fit
• No-maintenance design—no air lines, fittings, or pressure adjustments required
• Installs in under 30 minutes using basic hand tools
• Replaces factory bump stops with no drilling or modifications needed
• Lifetime warranty coverage on materials and workmanship

Unlike air bag systems, Timbren SES kits require zero post-installation maintenance and provide a true "set it and forget it" solution. The hollow rubber springs automatically cushion road shocks and progressively increase resistance as load weight increases, keeping your vehicle level whether loaded or unloaded. Ideal for truck campers, trailers, salt spreaders, and other top-heavy applications requiring maximum stability.