Fox 2011+ GMC Sierra 2500 HD 1.5-2.5in Lift Rear 2.5 Performance Series Smooth Body IFP HTO Shock

The FOX 2.5 Performance Series HTO is a bolt-on shock designed with position-sensitive technology, vehicle-specific valving, and larger pistons to improve on- and off-road performance. Its Type II anodized aluminum body efficiently dissipates heat and resists corrosion. The 2.5-inch shock body features an internal floating piston (IFP) that separates shock oil from high-pressure nitrogen to optimize damping. Hydraulic Top Out (HTO) technology provides usable position-sensitive rebound damping on and off pavement, reducing harsh top-outs and increasing comfort by forcing shock oil through a secondary shim stack to slow shock shaft speed. It offers bolt-on installation, position-sensitive rebound control, enhanced heat dissipation, corrosion resistance, and IFP design for consistent damping performance.