HKS Max IV SP Coilover Kit for Mazda RX-8

A sport suspension developed based on MAX IV GT also allows circuit driving with high-grip radial tires.

All-around damping force setting was made from a street to circuit drive without too much stiffness/softness by
reducing an excessive damping force.
> A test vehicle used a model "Spirit R" equipped with LSD and the tires changed to ADVAN A052, 18-inch that is
assuming the compatibility for recent more high-grip tires. For achieving the best damping force setting without any
deficient or excessive spring rate or damping force, a final check was held at a racing course in Fuji Speedway.
> RX-8 is a car that is difficult to ensure sufficient rear stroke amount due to the rear suspension shape. For ensuring
the stroke amount by employing the ride height adjuster thread cutting part to the shock body length adjustable
bracket. Overcoming the weak point of RX-8 and improved the stability of a car.
> Ensures the stroke amount by using helper springs at the top and bottom of the spring even though a high rate
spring is used at the front (16K)/at the rear (10K). As a result, it sufficiently improves ground contact properties.
> We recommend adjusting a damping force adjustment dial in around 15 to 20 steps for street use, 5 to 10 steps for
circuit use depending on your preference.
> Clearance from the ground has been confirmed in the tested vehicle equipped with 225/40R19 tires. Please be
careful an under panel, fuel tank and, catalyzer not to touch with the ground due to the small ground clearance of
RX-8. Especially please pay attention when using the common size of 265/35R18, 245/40R18 that has a small outer diameter