2011-2025 Duramax Rear 2.5 HTO Performance Series Single Shock 0-1" (KRS4009)

Fits

Fox direct replacement shocks deliver race-winning performance in a simple, bolt-on package. These Performance Series 2.5 shocks feature FOX's innovative Hydraulic Top Out (HTO) technology, providing position-sensitive rebound damping control. By utilizing a secondary shim stack to slow down shock shaft speed, HTO significantly reduces harsh top-outs and increases overall ride comfort. This is particularly beneficial for heavy-duty trucks equipped with heavier, more aggressive tires or those lifted above OEM specifications.

*Sold Individually

Part Number: KRS4009

• Hydraulic Top Out provides superior rebound damping
• Prevents harsh suspension "clunk" at full extension
• Increased oil capacity reduces heat fade during heavy towing or off-road use
• Engineered by Fox to fit 2011+ GM HD mounting locations without modification
• Designed to maximize suspension travel and control on and off the pavement
• Withstands the demands of the Chevrolet and GMC 2500HD/3500HD chassis

Shock Specs:

• Collapsed (in): 17.34"
• Extended (in): 26.02"
  

• 1 x Rear Fox 2.5 HTO Performance Series Shock

• Sold Individually.
  
• Designed for rear axle fitment on stock to slightly lifted applications.