SKU: 82004-AK002 | UPC: 4957266371923
HKS 19.8N/MM Helper Spring Set for 2013-2021 Toyota 86, Subaru BRZ, Scion FR-S
The HKS 19.8N/mm Helper Spring Set installs with HKS Hipermax coilovers to hold consistent preload on main springs. Designed for 2013-2021 Toyota 86, Subaru BRZ and Scion FR-S models, these springs prevent sagging at ride height for reliable suspension action. Drivers gain sharper turn-in and stable cornering on street or track.
Key Features
- 19.8N/mm Spring Rate: Matches HKS coilover tuning for even load distribution and prevents main spring bottoming under light compression
- High-Tensile Steel Build: Resists fatigue over long-term use while keeping precise coil spacing
- 85mm Free Length: Provides ample travel support without limiting damper stroke in Hipermax systems
- Direct HKS Compatibility: Bolts on with factory-spec inner diameter for 60mm coilover struts
- Pair Quantity: Complete set for front or rear axle replacement to restore full suspension performance
Product Notes
- Inspect coilover perch alignment before install to ensure level seating
- Clean springs regularly to avoid debris buildup affecting preload
- Ships in protective sleeve to prevent bending during transit
Installation Notes
- Professional installation recommended.
- Use spring compressor tool to safely preload main spring before adding helper
- Compatible with HKS Hipermax 4, S and R Spec coilover kits only
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2013-2016 | Scion | FR-S | Base |
| 2013-2020 | Subaru | BRZ | Base, Limited, Premium, tS |
| 2017-2021 | Toyota | 86 | Base, GT, Hakone Edition |
Why Choose HKS?
- 45+ years of JDM motorsport development refines every component
- Rigorous dyno and track testing ensures real-world durability
- Exact tolerances from Japanese manufacturing deliver repeatable results
Frequently Asked Questions
-
Q: Will this fit my 2015 Subaru BRZ with HKS Hipermax coilovers?
A: Yes, the 19.8N/mm rate pairs directly with Hipermax kits on 2013-2020 BRZ models for front or rear use -
Q: What material are the springs made from?
A: High-tensile chrome-vanadium steel with corrosion-resistant finish for extended service life -
Q: Does HKS offer a warranty on this part?
A: One-year limited warranty covers manufacturing defects when installed by certified shop
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact box 4 x 4 x 4 inches
- Weight: 0.3 lbs
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HKS
HKS is a Japanese manufacturer of premium performance parts founded in 1973 that has been at the forefront of turbocharged engine development, producing turbochargers, exhaust systems, engine management, intercoolers, and supporting performance components for some of the most iconic Japanese sports cars ever built. The brand's GT and GTIII turbocharger series, Super Sequential Blow Off Valves, and Racing Suction intake kits are recognized globally as benchmark-quality products that combine Japanese manufacturing precision with decades of motorsport development experience. HKS products are particularly well-known in the Toyota Supra, Mitsubishi Evo, Subaru STI, Nissan GT-R, and Honda NSX communities, where the brand's heritage in building the world's fastest versions of these cars has created a loyal following among enthusiasts who want the best available components. From a simple racing suction kit to a complete GT turbo with intercooler and ECU tune, HKS provides an end-to-end perf...
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