Premium Competition

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Premium Competition Coilover Application

PREMIUM COMPETITON coilovers are designed and developed for use in most motorsports. Through years of competition and testing, we have made uncountable improvements in setup for racing use in order to provide the most durable and competitive damper. Spring rates and shock valving are made for competition 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 other additional charge, please talk to us about your requirements before placing an order.





33-WAY DAMPENING ADJUSTABLE

This suspension system features 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 W/ ADJUSTABLE CAMBER PLATE

For suspension systems utilizing a Double A-Arm strut type, either pillow ball upper mount (without camber plate) or aluminum upper mount is available, our customers can select what they need at their decision. This coilover kit is supplied with aluminum upper mounts if customers do not specify when placing an order with us.
For suspension systems utilizing a MacPherson strut type, this coilover kit comes standard with pillow ball mounts with adjustable camber plates fronts and rears (where applicable).

MONOTUBE RACING SHOCK DESIGN

The needle valve piston is utilized to make the steering more agile and to stabilize the vehicle. In addition, motorsport spec piston with racing flow design has been developed and is integrated into this racing product. Spring rates and shock valving made for competition are significantly different from the ones for road use. A high rigidity 52mm shock body used for MacPherson strut type for extra oil capacity enables the cushioning force to have optimal linear change. High quality oil seals are utilized to withstand high temperatures and to prevent oil from escaping. 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 YELLOWSPEED to avoid any failure. Our commitment to continual driving improvement goes beyond words. As all struts/shocks in racing applications are used harshly and aggressively so the limited warranty on Premium Competition insert/shock is not covered.

HIGH RIGIDITY STEEL SPRING

Spring rates and shock valving made for competition are significantly different from the ones for road use. All springs are produced from high quality SAE9254 steel for optimal durability and high tensile strength. The spring rate and shape remains unchanged and undeformed, even the spring has been subjected to long term wear.

ADJUSTABLE SPRING SEAT

The spring seats are made from forged aluminum for durability and rigidity.

SHOCK BODY

Shock body is coated with Electroplating treatment to prevent rust and corrosion in the harsh conditions of motorsport.

FULL LENGTH ADJUSTABLE

A steel lower bracket is utilized for MacPherson strut type to increase rigidity for safety (where applicable). For most MacPherson strut models, the brake line bracket is welded manually 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 motorsport. 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

It 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 or longer.

WAVE ALLOY STEEL THRUST WASHER

For FRONT MacPherson strut models, 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 TOP

Spring bearing top is mounted under the pillowball mount to make the 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.