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EDFC ACTIVE PRO

"4x4 DAMPER SPORT" (1-Inch Lift) is renamed as "STREET ADVANCE Z4".

Click here for STREET ADVANCE Z4 product page

Specifications

Twin-Tube Hydraulic Bump Stopper Uses OE Mounts
Durable & Reliable Damping Force Adjustable EDFC Compatible

Product Specifications

Lift up

The ride height can be adjusted by moving the lower spring seat up or down. Its simple structure allows for easier handling.
Standard ride height for 4x4 DAMPER SPORT is set at 40mm (approx. 1.5 inch) higher than the original, to accommodate various driving scenes from streets to off-roading.

lift up

A New Formula and a New Structure!

Making an Incredibly Low Price a Reality

'Repairable' Unit of Parts 'Sealed Structure' Fixed Unit

About the Sealed Structure

The top end of the shell pipe is narrowed, oil and gas are injected, and the whole unit is sealed by crimping the metal.

This new approach massively shortens the production process. As a result, we have succeeded in vastly cutting production cost.

Partial Production Process of 4X4 DAMPER SPORT

Partial Production Process

Twin-Tube

Compared to the regular mono-tube system, twin-tube attains longer stroke with a smaller repulsive force, resulting in high ride comfort.

Mono-Tube / Twin-Tube

Roads may have all sorts of surface conditions. This calls for shock absorbers with ample stroke, that operate smoothly.

Thanks to this unique characteristic, you can negotiate gaps and bumps steadily on rough roads, meaning a smooth ride at low speed and stability at high speed.

Hydraulic Bump Stopper (H.B.S.)

H.B.S. improves comfort and durability, even when the vehicle is fully loaded,
as well as off-roading drivability.

How the H.B.S. Mechanism Works

Regular Shock Absorbers / Shock Absovers with H.B.S.

When regular shock absorbers fully stroke, their bump rubbers are compressed. The energy that is generated by that escapes as a repulsive force, which can disturb the vehicle's behavior. Furthermore, repeated full strokes can damage the damper.

In the same situation, 4X4 DAMPER SPORT, featuring H.B.S., internally converts the impact of the stroke to thermal energy (heat) and absorb it, strongly reducing the impact that disturbs the vehicle's behavior. With less damage to the dampers, H.B.S. also contributes to their durability.

Regular Shock Absorbers: Upward jolts and bounces

Driving over a bump, the vehicle jolts and bounces. It takes a while to regain control.

Shock Absorbers with H.B.S.: Smooth stabilization!

The vehicle smoothly processes the impact, does not bounce, and its behavior swiftly stabilizes.

The Hydraulic Bump Stopper (H.B.S.) Mechanism

Inactive H.B.S./H.B.S. Activated

In shock absorbers with inactive or no H.B.S., the operative valve (green) floats, and oil flows freely through the base valve ports. Resistance to the flow from the shim stack then, causes damping force.

Near full compression, when the piston rod strokes beyond a predetermined point, the operative valve is pushed down and activates H.B.S.: the base valve ports are narrowed, blocking the oil flow. This results in high damping force.

A relief valve serves to suppress sudden damping force increase, when the pressure in the cylinder exceeds its regular level.

The setup of the H.B.S. mechanism is optimized per vehicle model, with the right activation point and damping force.

H.B.S.: A Must for World-Class Rallies!

Rally Scene

Swiftly absorbing the impact of big jumps, H.B.S. effects a steady vehicle.

To avoid damages/breakages, conventional bump rubbers must also be fitted/used with H.B.S.-equipped dampers.

Uses OE Mounts

4X4 DAMPER SPORT uses the vehicle's original upper mounts (not included in our product kit).

OE Mounts

Durable & Reliable

Optimal Dust Boot

Dust Boot

Thanks to its smooth compression and high durability, the dust boot guards the piston rod from damage, and keeps foreign material out of the shock absorber.
(Some vehicles use their OE dust boots)

No-Sag Spring

Spring

Cold formed with SAE9254 steel (minimum tensile strength 200 kgf/mm2), our springs are outstandingly sag-proof and boast extreme resiliency.

Superior rust protection is ensured with a highly durable powder coating that does not peel or flake. Our high-quality springs can be used without worries, in any conditions.

High-Performance Damper Oil

Damper Oil

Since TEIN's damper oil maintains a stable viscosity in a broad temperature range, it sustains smooth stroke and reliable damping force in a variety of circumstances.

Due to excellent anti-foaming properties, it's resistant to cavitation (bubble forming). Since it withstands high heat too, it's suitable for intense sport driving as well.

Furthermore, the damper oil keeps up its superior performance long-term, because it's resistant to deterioration over time.

Rust-Proofing

TEIN-Green Powder Coating

Powder Coating

A bright TEIN-green powder paint is used on the shock absorber's shell case. Our powder coating technique produces an extremely strong and durable barrier. No harmful organic solvents are used, for minimal pollution.

Superior durability and corrosion resistance are achieved by TEIN's patented 2-Layer, 1-Bake powder coating method, which uses 2 layers of anti-rust paint on a blasted surface.
(Japanese patent number 4347712)

Damping Force Adjustable

4X4 DAMPER SPORT features 16-level damping force adjustment, for simultaneous adjustment of compression and rebound.
Modify ride comfort and handling according to your preference, changing the properties of the shock absorber with the adjustment dial.

Adjustment Dial

Adjust to Suit Driving Conditions

The above are examples; actual settings vary according to the vehicle's circumstances.

EDFC Compatible

The EDFC Series offer easy damping force adjustment from the driver's seat.*
* Some vehicle models are not compatible

A motor instead of adjustment dial

A motor instead of adjustment dial

Please note: the example in the photo is not 4X4 DAMPER SPORT

Remote adjustment from the cockpit!

EDFC Series Lineup

EDFC ACTIVE PRO

EDFC ACTIVE PRO

The Finest in Electronic Damping Force Controllers

Individual Wheel Control Cornering-Reactive

Accel/Deceleration-Reactive Speed-Reactive

Wireless Control

EDFC ACTIVE

EDFC ACTIVE

Electronic Damping Force Controller,
Featuring Auto-Adjustment

Accel/Deceleration-Reactive

Speed-Reactive (Optional Extra) Wireless Control

EDFC II

EDFC II

Basic Electronic Damping Force Controller