The Fox 980-26-966 2.0 Performance Series Adjustable Reservoir Shock for your 2011-2019 GM 2500HD/3500HD provides FOX's industry leading and race dominating performance in an affordable, hassle-free bolt on package. Its heat reducing design includes a metal impacted clear anodized aluminum shock body that dissipates heat faster than a conventional steel body shock. Its external reservoir allows for increase oil and nitrogen capacity while delivering striking race look. The included black anodized reservoir mounting clamp and other components are CNC machined from 6061-T6 aluminum. Included CD Adjuster delivers 8 clicks of compression adjustability - from very soft to very firm. The race developed high flow damping piston matched with application specific valving provides the 2.0 Performance Series Reservoir shock a predicable ride quality capable of handling the roughest road conditions. FEATURES: Body: 2.0" Metal impacted 6061-T6 aluminum will resist rust over time Body Plating: Clear-anodized for a durable finish External Reservoir: 2.0" Smooth bore 6061-T6 Aluminum is hard anodized Components: Black-anodized, CNC-machined 6061-T6 billet aluminum Shaft: 5/8" hard chrome plated heat-treated alloy steel Piston: Race-developed high-flow piston design Valving: Application specific valving to maximize performance Seals: Redundant sealing pack system main seal, wiper seal, scraper seal Oil: JM92 Advanced Suspension Fluid for improved performance at variable temperatures Bushings: Quiet nitrile rubber allows for increased suspension articulation Mounting: Direct replacement for stock and aftermarket lifts kits SPECIFICATIONS: Ext. Length: 22.809 Col. Length: 14.869 Travel: 7.940 Top Mount: Bar Pin Bottom Mount: Clevis Applications: 2011-2019 GM 2500HD/3500HD 2WD/4WD (Front) Lifted 4"-6"* Notes: This shock features a lower clevis mount. Please check and confirm that your application uses this style mount before ordering. 4"-6" Lift is suggested by mfg. Due to the many different aftermarket suspension systems it is recommended that a measurement is taken for proper application. Shock Absorbers sold individually. Product may appear different than image.