HKS Co. Ltd is an aftermarket automotive company based in Fujinomiya, Japan. The company specializes in creating high-performance parts designed for Japanese made vehicles. It was founded back in 1973 by Hiroyuki Hasegawa who used to work with Yamaha Motor Company, along with his partner Goichi Kitagawa and was financed by Sigma Automotive. The initials of the three were used to create the brand HKS.

The company has its humble beginnings in a small shed at the foot of Mount Fuji, catering to gasoline-powered engines used for farming. In 1974, they were the first company to introduce a turbocharger for commercial vehicles and was a hit, especially for those Japanese tuners who wanted more out of their vehicles. Today, HKS has become the brand everyone knows about when it comes to performance adders and has expanded its reach worldwide.

Kit includes:

Front and Rear Coilovers
Accessories
Adjustment Dial
Spanner Wrench
Spanner Wrench (12.7sq Slotted)
Warranty Certificate and Installation Manual

Specifications:

Spring Rate [N/mm (kgf/mm)] : F = 137 (14.0) | R = 137 (14.0)
Spring Length (mm) : F = 170 (Straight) | R = 150 (Straight)
Helper Spring Rate [N/mm (kgf/mm)] : F = 19.8 (2) | R = N/A
Helper Spring Length (mm) : F = 70 | R = N/A
Default Ride Height (mm) (Upper / Lower Limit) : F = -31 (0/ -81) | R = -31 (-12/ -94) *Compare to stock ride height
Upper Mount: F = Spherical Bearing | R= Stock
Damper Type: F = Inverted | R = Upright
Spring Rate Change : F= Available | R = Available
Optional Spring N/mm (kgf/mm) : F = ± 20 (2) | R = ± 20 (2)

Product features:

SRF (Super Response Fluid) Exclusive newly developed oil.

Improved damper oil quality and viscosity.
Improves characteristics of damping force, achieving great handling performance.
Suppresses temperature change caused by heat.

LVS (Low Vibration Spring) Exclusive high strength spring.

Manufactured with 210k grade high-strength wire rods.
Adopted to shorten wire length and reduce weight.
Improves Steering response.

Upper Spring Retainer (Exclusive for Hipermax R)

Allow the damping axis and spring load lines to align coaxially
Reducing of friction
Smoother damping

Fitment:

Honda Civic Type R 2007-2010

Note:

"MUGEN RR" compatibility has not been confirmed.
All pictures shown are for illustration purpose only.
Unauthorised reproduction and distribution is strictly prohibited.
Actual product may vary due to product enhancement.

Other Part Numbers:
HKS #hks80310-AH004

Proposition 65

$/!\ warning$ WARNING: Cancer and Reproductive Harm

https://www.P65Warnings.ca.gov

Make Vehicle	Model	Submodel	Year	Engine	Notes
2007-2009 Honda Civic Type-R	Civic Type-R		2007-2009

Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.

Warranty for Exhaust System

HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.