King RS4018-BP3P 4.0x18 Inch 3-Tube Bypass Racing Shock with Piggyback Reservoir

The King RS4018-BP3P is a premium 4.0-inch diameter race shock with 18 inches of travel, featuring a 3-tube bypass design with an integrated piggyback reservoir. King Pure Race series bypass shocks offer the ultimate in performance and adjustability, with every aspect optimized for all-out racing.

Advanced Bypass Technology:

• Position sensitive design ensures compression tubes have no influence on rebound tubes and vice versa, with each bypass stage separately tunable and operating independently
• 14 turns of precise adjustability for fine-tuned damping control
• Bypass valves and springs manufactured from heat treated stainless steel alloy for consistent fade-free operation
• Compact low-profile bypass tube design maximizes flow while maintaining minimal envelope

Premium Construction:

• Large 1.25-inch diameter shock shaft with induction hardening to 60-65 Rockwell, hard chrome plating, and 3 RMS mirror finish
• Cold drawn 2024 billet aluminum piston with optimized port designs based on extensive fluid dynamics knowledge
• Precision bored and honed shock tubes within +/- 0.001 inch tolerance for maximum flow and valving function
• CNC drilled, hand deburred, and polished bypass ports with aircraft-quality TIG welding, pressure tested to 300 PSI
• Replaceable Teflon-lined steel spherical bearings on both mounting ends

Race-Proven Reservoir:

• Threaded end caps for higher pressure resistance and easier maintenance, with lightweight aluminum construction for superior heat dissipation
• Premium Aeroquip hoses with highest temperature and pressure ratings, resistant to kinking

Each bypass shock is custom made for your specific application, delivering the race-winning performance and legendary ride quality that King is known for in the most demanding off-road racing environments.