King RS4520-BP5H 4.5 Race Series 5-Tube Bypass Shock 20 Inch Travel Remote Reservoir 1.25 Inch Shaft

The King RS4520-BP5H is a 4.5-inch Pure Race Series bypass shock engineered for extreme off-road racing and competition vehicles. This 20-inch travel shock features a 5-tube bypass hose configuration with remote reservoir and a large 1.25-inch diameter shaft, delivering professional-grade damping control for the most demanding racing conditions.

Pure Race Series Construction:

• 4.5-inch shock body precision bored to +/- .001 inch tolerances for optimal piston seal and valving function
• Large 1.25-inch diameter shaft induction hardened to 60-65 Rockwell, hard chrome plated and micro-polished to 3 RMS mirror finish
• 5-tube bypass system with 1.00-inch diameter 4130 Chromoly bypass tubes, TIG welded and pressure tested to 300 PSI
• Remote reservoir constructed from hard anodized 6063 aluminum alloy with threaded end caps for high-pressure capability
• Each bypass stage is separately tunable and position-sensitive, operating independently for precise damping control

Advanced Engineering Features:

• Cold-drawn 2024 billet aluminum piston with PTFE-impregnated bronze wear band and Viton o-ring double seal
• Stainless alloy heat-treated valve shims maintain consistent damping at temperatures up to 450 degrees
• Bypass ports are CNC drilled, hand de-burred and polished for unrestricted fluid flow
• Cadmium-plated shock cylinder honed after plating for tight piston seal
• Replaceable Teflon-lined steel spherical bearings at mounting points

Race-Proven Performance:

King's Pure Race Series shocks are designed with one purpose in mind: all-out racing. Proven in the toughest competitions including the Baja 1000 and Dakar Rally, these shocks deliver the control needed for high-speed desert racing and extreme off-road conditions. The 5-tube bypass design provides position-sensitive damping throughout the entire stroke, with the final compression stage functioning as a hydraulic bump stop. Fully rebuildable and tunable with simple hand tools, these shocks are 100% made in the USA from the highest quality materials available.

Specifications:

• Shock Body Diameter: 4.5 inches
• Travel/Stroke: 20 inches
• Shaft Diameter: 1.25 inches
• Bypass Configuration: 5-tube with hose routing
• Bypass Tube Diameter: 1.00 inch
• Reservoir Type: Remote hose-connected
• Made in USA