Timbren Industries GMFK25D SES Suspension Enhancement System

The Timbren Industries GMFK25D SES Suspension Enhancement System is a heavy-duty suspension upgrade designed to provide progressive load support for trucks during towing and hauling. This system uses hollow rubber springs that replace the factory bump stops, activating progressively as weight is added to deliver a smoother, more controlled ride without compromising unloaded comfort.

Key Features:

• Aeon hollow rubber spring technology provides progressive load support up to maximum capacity
• Eliminates squat, sway, and bottoming out when towing or hauling heavy loads
• No maintenance required - no air lines, compressors, or electronic components to fail
• Installs in approximately 30 minutes with basic hand tools, no drilling required
• Works independently with existing suspension system without affecting factory ride quality when unloaded
• Designed to fit specific GM truck applications for precise fitment
• Lifetime warranty against defects in materials and workmanship

The GMFK25D system is engineered for drivers who regularly tow trailers, haul cargo, or use their vehicle for work applications requiring additional suspension support. The self-adjusting design automatically engages as load increases, providing consistent performance across varying weight conditions while maintaining a comfortable ride for daily driving.