Tein 2009 - 2021 Nissan 370Z (Z34) / 2013 - 2015 Infiniti Q50 EnduraPro Plus Shocks Kit
VSK04-B1DS2
Product Specifications
EnduraPro and EnduraPro PLUS are high-performance OE-shape shock absorbers. Designed to use with the vehicle's original (OE) spring and upper mount, their lower spring seat is shaped identical to the OE shock absorber. In addition to replacing worn or leaking OE dampers, these products are excellent to improve specs like ride quality or handling without changing your ride height. You can also use them with TEIN lowering springs.
Because EnduraPro and EnduraPro PLUS can be purchased per 1 shock absorber, you can limit the cost for replacing worn or damaged dampers.
Sealed Structure
A "sealed structure", attained by a new production formula,
combines high quality with reduced cost.
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 EnduraPro and EnduraPro PLUS
High Strength and Durability
Fortified Installation Points
Example: Thickness comparison of front installation bracket for Honda Jazz/Fit GP5
- OE
- EnduraPro
For strut-type suspensions a thickness increase improves the strength and durability of the bracket attaching to the vehicle (steering knuckle) compared to OE shock absorbers. This higher rigidity of the knuckle's support also improves steering feel and makes the ride feel more stable. Please note that the thickness increase varies per vehicle model.
Fortified Shell Case with Large Oil Capacity
The shell case, the key part of the shock absorber, is made of a high-strength material with tensile strength around 150% of the OE shell case. Weight increase is curbed by keeping the thickness of the cylinder wall the same. A bigger shell case diameter expands its oil capacity, for improved durability as well as a long-term stable damping force performance.
- Example: Comparisons for the Honda Jazz/Fit (GP5)
- Shell Case Tensile Strength
-
OE EnduraPro Tensile Strength (Mpa) 340 510 - Shell Case Diameter
-
OE EnduraPro Front Shock Absorbers φ45 φ55 Rear Shock Absorbers φ45 φ50.8
Please note: tensile strength and diameter of shell case vary per vehicle model.
High-Performance Damper Oil
Exhibiting a stable viscosity in a broad temperature range, the high-performance damper oil sustains smooth strokes and a reliable damping force under all kinds of circumstances. It has excellent anti-foaming properties that protect it from cavitation (bubble-forming), and is resistant to overheating, so that it works noiselessly even on rough roads. The damper oil keeps up its superior performance long-term, because it is also resistant to deterioration over time.
Rustproof Surface Treatment
The shell case's bright TEIN-green powder paint coating excels in strength and durability, while our coating technique is eco-friendly and without organic solvents. After pre-treatment, TEIN's patented 2-Layer, 1-Bake powder coating method with corrosion-proofing paint is used for superior durability and rust protection.*
Outstandingly corrosion-resistant, EnduraPro and EnduraPro PLUS can safely be used in regions with heavy snowfall or coastal areas, etc.
* Japanese patent number 4347712
More comfort and higher durability at maximum passenger and cargo load.
How the H.B.S. Mechanism Works
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 EnduraPro and EnduraPro PLUS, featuring H.B.S., internally convert 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.
Driving over a bump, the vehicle jolts and bounces. It takes a while to regain control.
The vehicle smoothly processes the impact, does not bounce, and its behavior swiftly stabilizes.
The Hydraulic Bump Stopper (H.B.S.) Mechanism
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.
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