ReviewsConsistent Damping Force

Progressive Suspension 412-4003B Black 13.5\ Heavy Duty Replacement Rear Suspension Shock

Steel double wall damper with multistage velocity sensitive damping.
High pressure gas charged for consistent damping performance.
Heavy duty progressive rate spring in black finish.
The 412 Series proven, durable design means they will be an improvement to your motorcycle's suspension performance.

... Lightweight Design--FASTACE is a lightweight spring damper designed and manufactured for fast downhill bikes. Its inner and outer tubes, upper and lower plates, left and right legs are made of aluminum alloy with high strength and light weight, and the interior is designed with spring and oil pressure damping..
Hydraulic Damping System--The hydraulic damping system is inside the front fork right tube, that is, damping force generated by reciprocating motion of piston and valve plate in hydraulic oil is used to suppress vibration and impact caused by acceleration and deceleration of vehicles and road bumps. The internal damper adopts wear-resistant, low freezing point,special oil for high quality shock absorber to ensure the damping stability and reliability..
⭐⭐Alloy Steel Spring Design--High strength alloy steel spring design is used inside the front suspension left tube, which can reduce weight and support the rider's weight compared with the conventional spring, so as to meet the various needs of your daily riding..
Multi Function--200mm travel, for MTB bicycle wheels, 26/27.5/29 -inch beach bike/s....

This belt assures accurate belt tension, alliance and damping which considerably enhances performance..
With the help of vibration damping system, it increases tension and keeps the amount of energy reduced to a natural frequency for lasting use.
Torsional round spring design causes consistent tension and helps in preventing the contamination. This ensures high durability.
Provides a complete range coverage for domestic applications and those that are imported or heavy-duty.

Durable design means they will be an improvement to your motorcycle's suspension performance.
All steel double wall damper with multistage velocity sensitive damping.
High pressure gas charged for consistent damping performance.

ensures proper belt tension, alignment, and damping for superior performance.
patented vibration damping system increases tensioner, belt, and accessory component life for long lasting use.
torsional round spring design provides consistent tension and does not allow contamination for enhanced durability.
provides full line coverage for domestic, import, and heavy duty applications.

... Lightweight Design--FASTACE is a lightweight spring damper designed and manufactured for fast downhill bikes. Its inner and outer tubes, upper and lower plates, left and right legs are made of aluminum alloy with high strength and light weight, and the interior is designed with spring and oil pressure damping..
Hydraulic Damping System--The hydraulic damping system is inside the front fork right tube, that is, damping force generated by reciprocating motion of piston and valve plate in hydraulic oil is used to suppress vibration and impact caused by acceleration and deceleration of vehicles and road bumps. The internal damper adopts wear-resistant, low freezing point,special oil for high quality shock absorber to ensure the damping stability and reliability..
⭐⭐Alloy Steel Spring Design--High strength alloy steel spring design is used inside the front suspension left tube, which can reduce weight and support the rider's weight compared with the conventional spring, so as to meet the various needs of your daily riding..
Multi Function--200mm travel, for MTB bicycle wheels, 26/27.5/29 -inch beach bike/snow b....

Durable design means they will be an improvement to your motorcycle’s suspension performance.
All steel double wall damper with multistage velocity sensitive damping.
High pressure gas charged for consistent damping performance.

[High quality] This shock absorber is made with high quality material, with long serving life, durable and easy to use. It provides a more consistent wear surface, good damping, high hardness and strong heat resistance..
[Good performance] Single-tube design and good sealing can greatly reduce the shock and improve the stability, keeping you in control at all times..
[Self-pressure-regulation] This pneumatic shock absorber features self-pressure-regulation function, so it can absorb more effectively. The spring inside can reset the piston rod fast cause the perfect movement of the check valve..
[Feature] It can reduce shock and noise in automated mechanical operations, enhance working efficiency, easy to install..

Compatible With Lexus LS400 (UCF10) 1990 1991 1992 1993 1994.
Spring Rate (Front/Rear) : 12 kg/mm/8 kg/mm.
52mm Mono-Tube Steel Alloy Shock With 32 Levels of Damping Adjustment Corresponds to Daily Driving Scene To The Sunday Track.
Performance Internal Piston With Koyo Japan 6204z Bearing Provides Smooth Stroke.
Powder Coated CNC Machined Aluminum And Carbon Steel Accessories.
Full 1 Year Limited Warranty From Date Of Purchase.
Install By Experienced Professional Is Highly Recommended.

Ensures proper belt tension, alignment, and damping for superior performance.
Patented vibration damping system increases tensioner, belt, and accessory component life for long lasting use.
Torsional round spring design provides consistent tension and does not allow contamination for enhanced durability.
Provides full line coverage for domestic, import, and heavy duty applications.
Professional, premium aftermarket replacement, Provides the performance and dependability you expect from ACDelco and Manufactured to meet expectations for fit, form, and function.

Fitment:Belt tensioner fit for Dodge 1994-2002 Ram 2500/1994-2002 3500/1989-1993 W250/1989-1993 W350,Please check Amazon Part Finder before Purchase.
This belt assures accurate belt tension, alliance and damping which considerably enhances performance..
With the help of vibration damping system, it increases tension and keeps the amount of energy reduced to a natural frequency for lasting use.
Torsional round spring design causes consistent tension and helps in preventing the contamination. This ensures high durability.
Provides a complete range coverage for domestic applications and those that are imported or heavy-duty.