What does the 3-tube bypass system do?

The three bypass tubes allow you to externally adjust the shock's damping characteristics. By controlling the fluid flow through these tubes, you can fine-tune how the shock compresses and rebounds, adapting it to different terrains and driving styles.

Why is a remote reservoir important?

The remote reservoir increases the shock's overall fluid capacity and helps dissipate heat more effectively. This is crucial for maintaining consistent damping performance, especially during prolonged use or high-speed off-road driving, preventing shock fade.

What kind of vehicle is this shock typically used for?

This type of high-performance race shock is generally used in custom off-road vehicles, such as rock crawlers, desert race trucks, or heavily modified Jeeps and trucks where builders require advanced tuning capabilities and robust construction.

King Shocks 4.0 Race Shock Bypass Remote Reservoir RS4012-BP

Name: King Shocks 12in 4.0 Race Shock 3 Tube Bypass Hose Remote Res 1.25in Shaft Large 1in Bypass Tubes
Brand: King Shocks
SKU: king-shocks-king-shocks-12in-4-0-race-shock-3-tube-bypass-hose-remote-res-1-25in-t14-320798
Price: 2519.73 USD
Availability: BackOrder

King Shocks 12in 4.0 Race Shock 3 Tube Bypass Hose Remote Res 1.25in Shaft Large 1in Bypass Tubes

$2519.73

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 4.0 Race Shock with 3-tube bypass and remote reservoir. Built for serious off-road performance.

Key Features

This product is a 12-inch 4.0 race shock.
It includes a 1.25-inch diameter shaft for strength and durability.
Features large 1-inch bypass tubes for adjustable damping control.
Comes with a remote reservoir to aid in cooling and fluid capacity.
The shock utilizes a 3-tube bypass design for fine-tuned suspension response.
Built for demanding off-road applications where precise tuning is essential.

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Product Details

What you get with this King Shocks RS4012-BP3H is a serious piece of suspension hardware: a 12-inch 4.0 race shock. It features a 1.25-inch diameter shaft and large 1-inch bypass tubes, along with a remote reservoir and a 3-tube bypass design. This isn't your average bolt-on upgrade; this is a component built for vehicles that see heavy use off-road, where precise damping control and the ability to tune suspension response are critical.

The core of this shock is its advanced bypass system. The three bypass tubes allow you to precisely control how the shock compresses and rebounds. By adjusting the flow through these tubes, you can fine-tune the damping characteristics to match specific terrain, driving styles, or load conditions. This level of adjustability is key for maximizing tire contact with the ground, improving handling, and providing a more comfortable ride even when pushing the limits. The 4.0-inch diameter body offers ample fluid capacity, which helps dissipate heat effectively, crucial for maintaining consistent performance during long runs or demanding off-road excursions. The remote reservoir further aids in cooling and provides additional fluid volume, ensuring the shock operates within optimal temperature ranges.

This shock is designed for builders and racers who need to dial in their suspension for peak performance. The robust construction and the ability to externally adjust damping through the bypass tubes make it a versatile choice for custom off-road builds. While specific vehicle fitment isn't listed here, shocks of this caliber are typically integrated into custom suspension setups where precise tuning is paramount. You'll want to ensure your vehicle's suspension geometry and mounting points are compatible with a 12-inch stroke shock and that you have the space to properly mount the remote reservoir.