Fox Shocks 987-24-030 11-19 GM 2500 3500 FRONT 2.5 TRUCK PS IFP 0-1IN LIFT HTO SHOCK ABSORBERFox Shocks 987 24 030 CHEVROLET SILVERADO & GMC SIERRA 2500 3500 2. 5 PERFORMANCE SERIES FOX 2. 5 Performance Series HTO shock is a bolt on shock loaded with position sensitive technology, vehicle specific valving, and larger pistons to improve on and off road performance. A type II anodized aluminum body efficiently dissipates heat and prevents corrosion. The 2. 5 inch shock body features an internal floating piston (IFP) to separate the shock oil