HKS Hipermax IV SP Coilovers - 2015+ WRX and WRX STI

Regular price $1,626.00 USD Sale price $1,626.00 USD Regular price $1,900.00 USD
Sale 14.42% $274.00 USD (14.42%)
In Stock!
SKU: hks80250-AF003
Product Description

Adjusting your vehicles suspension is one of the easiest ways to instantly improve overall performance. HKS offers a complete line of coilover suspension systems for every need. The HKS Hipermax IV line is their top tier setup, tuned and designed for street performance and race applications. HKS utilizes its experience from 35 years of circuit, GT, drift, and drag racing to bring you the cutting edge in suspension technology.

Includes Top Camber Adjustment Plates.


  • Subaru WRX [VA] (2015, 2016, 2017, 2018, 2019, 2020, 2021)
  • Subaru WRX STI [VA] (2015, 2016, 2017, 2018, 2019, 2020, 2021)


  • Monotube Design for constant and stable suspension response
  • 30-step Dampening Adjustable
  • PNE coilover coating (better than anodizing) for corrosion protection
  • Newly designed needle that adjusts dampening from low and middle/high speeds for provide a comfortable ride
  • Dust boots included for debris protection
  • Aluminum used where possible to reduce un-sprung weight
  • Special HKS formulated piston oil used
  • Inverted front piston for better handling and steering response

Extended Information

  • Damping Force (Front): 1991m/sec (Rebound) & 373m/sec (Compression)
  • Damping Force (Rear): 726m/sec (Rebound) & 147m/sec (Compression)
  • Front Upper Mount: Spherical Bearing
  • Lowering (Front): -26mm (From 0 to -71mm)
  • Lowering (Rear): -36mm (From 0 to -66mm)
  • Rear Upper Mount: Spherical Bearing
  • Spring Length (Front): 170mm
  • Spring Length (Rear): 170mm
  • Spring Rate (Front): 118N/mm (12kgf/mm)
  • Spring Rate (Rear): 98N/mm (10kgf/mm)
  • Type: Monotube Coilover
  • Chasis: VA
  • Warranty: HKS Manufactures Warranty

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

Customer Reviews

Based on 3 reviews
Kevin L. (Los Angeles, CA, US)
HKS Hipermax IV SP

Shipped super fast got it within 2 days. Installed ride is smooth well made by Japan. Need to play with damper to get what you want. Double check the preset ride height because some not exactly the same it was off by 1/4 of an inch when I got mine. I'm not sure if the preload is set correctly that my gap from spring lock nut or ride height just off. Double check with factory.

Eric F. (Bristow, VA, US)
HKS Hipermax SP

Great customer service and product even arrived early. Coils look amazing!

Wesley C.

I have driven a lot of different sports cars, various suspension setups but these coilovers are something else! Someone else asked me how they are and the best description is yes they are "stiffer" than stock but not a bad stiffness, a stiffness that kinda rolls your wheels/tires through every nook and cranny of the asphalt and transmits it back to the driver for amazing control! Cant imagine these dialed in on the track! Been running them on the factory settings preset by HKS for my Sti for the past few days since install as well.