Timbren Industries FR350SDF Rear Suspension Enhancement System

The Timbren FR350SDF Suspension Enhancement System is a rear suspension upgrade kit designed to eliminate sagging, improve load handling, and enhance ride quality. This professional-grade kit features patented Aeon hollow rubber springs that deliver progressive spring rate technology, automatically adjusting to varying loads and road conditions without any driver intervention.

Key Features:

• 8,600 lbs load capacity per pair for heavy-duty towing and hauling
• Patented Aeon hollow rubber springs with progressive spring rate
• Eliminates rear-end sag, squat, and sway under load
• Maintenance-free operation - no air lines, compressors, or fittings
• Bolt-on installation with basic hand tools, no drilling required
• Laser-cut steel brackets with black powder-coated finish
• Cushions road shocks and absorbs bumps for improved ride comfort
• Works seamlessly when unloaded - maintains factory ride quality
• Lifetime warranty on materials and workmanship

What's Included:

• 2 Aeon hollow rubber springs (bump stops)
• 2 Mounting brackets
• 2 Rubber spacers (½")
• Complete mounting hardware

Unlike air suspension systems, the Timbren SES requires zero maintenance after installation. The hollow rubber springs automatically compress more as weight increases, providing progressive support that keeps your vehicle level whether pulling a trailer or carrying heavy cargo in the bed. This system replaces the factory jounce stops on the frame, integrating seamlessly with your existing suspension. Installation typically takes under an hour with basic hand tools and requires no modifications to your vehicle.

Important: This system increases spring rate but does not increase your vehicle's GVWR (Gross Vehicle Weight Rating). Always ensure loads do not exceed the manufacturer's specified GVWR.