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HKS HIPERMAX IV SP COILOVERS SILVIA S15Spring Rate (Rear): 49N/mm (5kgf/mm)Spring Rate (Front): 78N/mm (8kgf/mm)The sport model to have a comfortable drive even in the winding road.This MAX IV SP is the ultimate sport model for such a high grip radial tire. It will transfer the feelings straight to driver all kinds of information such as tire, road surface condition and traction. It’s a perfect street sport model suspension for people who love to drive fast but still want comfort.Single Tube Damper DesignMono tube dampers allow for more accurate and stable control and adjustment of dampening. Lower ride height and centre of gravity gives a more stable ride.Dust BootProtect the shaft from the flying stones.PNE CoatingUsing this special surface coating provides 5 times better durability over standard galvanising. This prevents build-up around the threads of the adjustment areas allowing for easier height adjustment.M ShaftWith the new design of cylinder shaft since the HIPERMAX M-1, MAX IV increased the cylinder shaft size to have a firm damping even at a little stroke range by optimizing the oil pressure characteristic. We mainly adopted this to the rear damper that can have a better driving experience.Adopted Pillow Ball Upper MountFor more accurate and sharp steering.New Design NeedleNewly designed needle has been used to revise the very low speed and middle and high speed dampening which is key to a comfort ride.Reduction of Unsprung WeightIn order to reduce unsprung weight, bracket, ride height adjusters and lock nuts are made from aluminium. (Not for all vehicles)30 Step Damping Force Adjustment30 levels of dampening adjustment allow fine tune adjustment for street, circuit winding roads, highway, or the weight of the vehicle.
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