HKS Hipermax S Coilover Full Kit - Nissan Skyline 400R (RV37) 2019+

Both ends use an upright monotube damper with 30 steps of damping force adjustment, and every corner is adjusted through a remote cable so the dials stay accessible in a fully trimmed sedan. HKS specifies a firm 14.0 kgf/mm front and 8.0 kgf/mm rear spring pairing with helper springs at all four corners to control the weight of the twin-turbo VR30DDTT. Full-length shock body adjustment covers stock ride height down to 45 mm lower at the front and 15 mm to 58 mm lower at the rear. HKS lists this part number for the 400R specifically, a Japanese market Skyline grade.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy