HKS Hipermax R Coilovers (9K Front / 10K Rear) - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

HKS Hipermax R Coilovers (9K Front / 10K Rear) - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86Hipermax R Coilovers for the 2013 2021 FR S, BRZ, and 86 The HKS Hipermax R Coilovers at 9K front and 10K rear for the 2013 2021 Scion FR S, Subaru BRZ, and Toyota 86 are HKS's performance focused coilover for the first generation FT86 platform. The R designation sits above the HIPERMAX S in the HKS lineup. Firmer spring rates, stiffer damping, calibrated for drivers who take the FT86 to the track regularly. The asymmetric 9K 10K spring rate is the

Hipermax R Coilovers for the 2013-2021 FR-S, BRZ, and 86

The HKS Hipermax R Coilovers at 9K front and 10K rear for the 2013-2021 Scion FR-S, Subaru BRZ, and Toyota 86 are HKS's performance-focused coilover for the first-generation FT86 platform. The R designation sits above the HIPERMAX S in the HKS lineup. Firmer spring rates, stiffer damping, calibrated for drivers who take the FT86 to the track regularly. The asymmetric 9K/10K spring rate is the same logic applied to the second-generation chassis: the stiffer rear rate supports the platform's weight distribution in high-load cornering.

Specs & Highlights

• 9K front / 10K rear spring rates
• Performance-oriented damper valving
• Height adjustable
• Designed for track-focused use on the FA20 chassis
• Asymmetric spring rates for platform-specific balance
• Fitment: 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

9/10 kgf/mm, 46mm Inverted Strut, -20 to -50mm

The AT001 runs 9 kgf/mm (504 lbf/in) front and 10 kgf/mm (560 lbf/in) rear, the same rates as the second-generation AT006 application. The 46mm inverted strut design provides better camber curve control at the higher spring rates than a conventional strut would. Ride height adjustment is -20mm to -50mm front and -15mm to -45mm rear. The asymmetric 9/10 spring rate was derived from HKS's time attack testing on the FT86 platform, where a stiffer rear relative to front was found to produce the most consistent neutral handling balance across a full track session.

Asymmetric Spring Rates from HKS Time Attack Testing

The FA20 chassis in the original FR-S and BRZ is one of the best-balanced platforms for coilover work. The neutral weight distribution and low center of gravity respond well to proper spring and damper calibration. The Hipermax R takes advantage of that by providing rates that allow the suspension to work correctly through the full range of performance driving inputs.

Performance Coilover, Not a Street Compromise

The Hipermax R does not try to be compliant for daily driving. It is a performance coilover for an owner who has decided what the car is for. Ride quality on imperfect surfaces is firm. On smooth tarmac and at the track, the R delivers handling that justifies its position in the HKS lineup. Four-wheel alignment after installation is required.

The FT Breakdown

The Hipermax R at 9K/10K is HKS's recommendation for FR-S, BRZ, and 86 owners who track their car regularly. The HIPERMAX S is the better choice for mixed-use. If the car goes to autocross events, time trials, or track days with any regularity, the R is the correct specification. The 9/10 kgf/mm asymmetric rates derived from HKS time attack testing of the first-generation FT86 platform are a specification that has been validated across hundreds of track sessions by HKS and their affiliated teams. When a company that campaigns race cars tests a suspension setup on the same platform you are working with, the spring rate recommendation carries a different level of authority than a calculation from first principles.