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Premium Competition Coilovers

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Fitments

Product Description

The Yellow Speed premium competition coilovers are designed and developed for use in a variety of motorsports events. Through years of competition and testing, we have made uncountable improvements in our setup for racing use in order to provide the most durable and competitive damper. Spring rates and shock valving are designed for competition use to make the vehicle more controlled and balanced.

This suspension system features 33-way dampening adjustment and full length adjustment to accommodate every driver’s needs. The lower mounts are manufactured from lightweight alloy aluminum to reduce unsprung weight. The pillow ball top mounts are used on McPherson struts for maximum handling and performance.

※ The linear rate spring can be selected with tailored setup of the coilover system to meet your needs without any additional charge, please contact us about your requirements before placing an order.

33-WAY DAMPENING ADJUSTABLE
This suspension system features a 33-way dampening force adjustment (compression/ rebound). A wide range of dampening adjustments can be made to provide a variety of responses to different road conditions and to tune ride feel.

PILLOW BALL UPPER MOUNT (* SOME MODELS W/ ADJUSTABLE CAMBER PLATE)
For the Premium Competition coilover sets, either pillow ball upper mounts (without camber plate) or aluminum upper mounts are available for the Double-A Arm strut. Our customers can choose which style of upper mount they would like on their kit. The standard setup is aluminum upper mounts if customers do not specify their choice at the time of ordering.

For MacPherson strut type coilover, pillow ball mounts are equipped on the upper mounts to offer direct and complete handling response. For some models, the adjustable camber plate is provided (where applicable, please refer to our application sheet) allowing for the camber to be adjusted to prevent from excessive tire wear.

MONO TUBE INTERNAL DESIGN
The needle valve piston (materials imported from Sweden) is utilized to make the steering more agile and to stabilize the vehicle. Spring rates and shock valving made for competition are significantly different from the ones for street use. High rigidity 52mm shock body(for MacPherson strut type) for extra oil capacity enables the cushioning force to have optimal linear change. We use a highly reputable seal brand – NOK, whose seals can withstand high temperatures and prevent oil leakage. The piston rod is made from high quality S45C steel and is processed with Thermal Refining and High-frequency Induction Hardening treatments for rigidity and durability. Each component of the suspension system is rigorously inspected and strictly tested by Yellow Speed Racing to avoid any failures. Our commitment to continual driving improvement goes beyond words.

HIGH RIGIDITY STEEL SPRING
Spring rates and shock valving made for competition are significantly different from the ones for street use. All springs are produced from high quality SAE9254 spring steel for optimal durability and high tensile strength. The spring rate remains unchanged and will not become deformed, even after the spring has been used for a long time, and even if compressed or extended.

ADJUSTABLE SPRING SEAT
Our spring seats are made from forged aluminum for durability and rigidity.

FULL LENGTH ADJUSTABLE
A steel lower bracket is utilized for MacPherson strut type to increase rigidity for safety (where applicable). For some MacPherson strut models, the brake line bracket is welded perfectly to the steel lower mount. A high quality forged alloy aluminum lower bracket is used for Double-A Arm strut type (where applicable). The steel/aluminum lower bracket is processed with electroplated/ anodized surface treatment to prevent corrosion or rust in the harsh conditions of motorsports. The vehicle ride height can be adjusted easily with the lower bracket by winding up and down to drop and raise. With the lower bracket, it allows maximum suspension travel without affecting the shock stroke.

LOWER LOCKING COLLAR
Our lower locking collar is made from forged 6061 aluminum for increased strength and rigidity.

DEVELOPED DAMPING OIL
High-viscosity formula damping oil for competition is used for oil molecule protection against the highest temperatures to last the lifetime of the damper.

Wave Alloy Steel Thrust Washer
For FRONT MacPherson strut models, a wave alloy steel thrust washer is installed between a lower locking collar and a bottom mount. The wave thrust washer can provide a controlled amount of friction between the lower locking collar and the bottom mount to effectively prevent the lower bracket from spinning around or becoming loose.

SPRING BEARING MOUNT
The spring bearing is mounted between the spring and the top cap to make handling more agile and to eliminate the spring noise caused by car cornering. This design enables the spring and the shock to perform together more effectively. Clean and grease the spring bearing periodically to prevent from rust or corrosion, which can make the spring bearing last longer.
The spring bearing is a wear and tear item such as pillow ball bearing, rubber bushing, brake pads, brake rotor, oil seal etc.., and it will be worn out or deformed after having been used for a certain period. Therefore, our warranty does not cover spring bearings or metal shims that go on top and bottom of the spring bearings.

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