King RS4012-BP4H 4.0 Pure Race Series Bypass Shock 12 Inch Stroke 4 Tube Remote Reservoir

The King RS4012-BP4H is a 4.0-inch Pure Race Series bypass shock designed for all-out racing applications. This premium shock features a 12-inch stroke length with a 4-tube bypass configuration and remote reservoir connected via hose for optimal positioning and heat dissipation.

Advanced Shaft Construction:

The 1.25-inch diameter shock shaft is induction hardened to 60-65 on the Rockwell scale, hard chrome plated, and micro-polished to a 3 RMS mirror finish for exceptional durability and sealing performance. King's proven rod end attachment method hydraulically presses the shaft through a threaded bung, then TIG welds it to the shaft end before threading on the rod end, removing all threads from the external shaft portion for unmatched strength.

Bypass Technology:

The bypass valves and springs are manufactured from heat-treated stainless steel alloy for consistent, fade-free operation with 14 turns of precise adjustability. The position-sensitive design ensures compression tubes have no influence on rebound tubes, with each bypass stage separately tunable and operating independently. The large 1.00-inch bypass tubes provide superior flow capacity and control.

Key Features:

• 4.0-inch body diameter for maximum damping capacity
• 12-inch stroke length
• 1.25-inch hardened and chrome-plated shaft
• 4-tube bypass configuration with large 1.00-inch tubes
• Remote reservoir with hose connection
• Replaceable Teflon-lined steel spherical bearings at both mounting ends
• Threaded reservoir end caps for higher pressure capability and easier maintenance
• Custom-made for specific racing applications

Engineered for extreme off-road racing, rock crawling, and high-performance suspension systems where position-sensitive damping control is critical.