What is the primary benefit of the bypass tubes on this shock?

The bypass tubes allow you to independently adjust the compression and rebound damping characteristics of the shock. This means you can fine-tune how the suspension reacts to different types of terrain and impacts, offering a level of control not found in standard shocks.

How does the piggyback reservoir improve performance?

The piggyback reservoir holds extra oil, which helps to keep the shock cooler during extended use, preventing performance fade. It also provides an external point for adjusting damping settings, making it easier to tune the shock's response.

What kind of vehicle applications are these shocks best suited for?

These shocks are designed for high-performance off-road vehicles, especially those used in racing, desert running, or extreme rock crawling. They are ideal for custom suspension setups where maximum damping control and durability are essential.

King Shocks 4.0 Race Shock RS4018-BP6P

Name: King Shocks 4.0 Series Race Shock Piggyback Res 1.25in Shaft 1in Bypass Tubes
Brand: King Shocks
SKU: king-shocks-king-shocks-4-0-series-race-shock-piggyback-res-1-25in-shaft-1in-byp-t14-504427
Price: 2898.41 USD
Availability: BackOrder

King Shocks 4.0 Series Race Shock Piggyback Res 1.25in Shaft 1in Bypass Tubes

$2898.41

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Shocks 18in 4.0 Race Shock 6 Tube Bypass Piggyback Res 1.25in Shaft Large 1in Bypass Tubes

Key Features

Fits custom suspension applications requiring high-performance damping.
Features a 4.0-inch diameter shock body for ample oil volume and heat dissipation.
Includes a piggyback reservoir for enhanced cooling and external damping adjustment.
Equipped with six 1-inch bypass tubes for advanced tuning of compression and rebound.
Built with a strong 1.25-inch diameter shaft to handle extreme off-road conditions.
Designed for race applications and demanding off-road use where precise control is needed.

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Product Details

This is a King Shocks 4.0 Series Race Shock, specifically the RS4018-BP6P model. It's built for serious off-road performance, featuring a 1.25-inch diameter shaft and a piggyback reservoir for improved cooling and adjustability. The six 1-inch bypass tubes allow for fine-tuning of compression and rebound characteristics, giving you precise control over your suspension's response across a wide range of terrain. This shock is designed for applications where maximum damping control and heat dissipation are critical, such as desert racing or extreme rock crawling.

The 4.0-inch diameter shock body offers a large volume of oil, which helps keep temperatures down during prolonged use, preventing shock fade. The piggyback reservoir is mounted directly to the shock body, making for a clean installation and providing an easy way to access the damping adjustments. The 1.25-inch shaft is robust and built to withstand the rigors of competitive off-roading. These shocks are known for their ability to soak up large impacts while maintaining composure, providing a comfortable ride even when pushed hard.

When installing these shocks, you'll want to ensure you have the proper mounting hardware and that your vehicle's suspension geometry is set up to take full advantage of their capabilities. Because these are bypass shocks, they offer a level of tunability that goes beyond standard shocks, allowing you to dial in the ride for specific conditions or driving styles. This makes them a popular choice for custom builds and race vehicles where performance is the top priority.