Product Overview
Tein 06-13 Lexus IS250/350 (GSE20L/GSE21L) / 08-11 IS F (USE20L) RX1 Coilovers
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.
To avoid damages/breakages, conventional bump rubbers must also be fitted/used with H.B.S.-equipped dampers.
Camber Adjustable Lower Bracket
Lower brackets on strut type suspensions come with camber angle adjustment feature. Camber angle can be adjusted by rotating the eccentric washer 180°. This feature can enable camber angle adjustment, even if it can not be adjusted with the upper mounts.
*Except some models (e.g. strut with insert type brackets)
