Code No. 80300-AA005
*This photo is a prototype and may differ from the actual product.
■Features
- The C8 Corvette combines sporty performance with refined styling. This model sits lower than stock, enhancing its sleek silhouette.
- While the Z06 has a stiff ride around town, the HIPERMAX S offers a comfortable yet fun driving experience, whether you're cruising city streets or hitting the track.
- It remains compatible with the factory hydraulic lift system, preserving stock convenience even when lowered.
- Includes a 3-year or 30,000km warranty—HKS quality you can trust, backed by strict in-house control. An error canceller for the stock electronic dampers comes standard.
■Developer’s comments
- The stock Z06 has a large gap between the tires and fenders, giving it a high-riding look that takes away from its sporty styling. Lowering the car restores its sleek appearance.
- Ride quality is also harsh, as the factory magnetic dampers and high-rate springs don’t pair well. To address this, we conducted real-world testing—not just calculations—to improve both comfort and performance. While a bit of stiffness remains at the end of the stroke, it’s a clear upgrade from stock.
- Designed for drivers who enjoy sporty handling and firm damping, this setup performs well from city streets to track days.
- We recommend setting the damping 20 clicks back for a smooth yet controlled ride. For more stability at high speeds, 15 clicks back is ideal.
Performance evaluation radar chart
■Other Features
The HIPERMAX S has evolved with the introduction of a dual preload valve system for improved performance. In terms of quality, it now features laser-etched markings and comes standard with spring insulators. It also includes a long-term warranty of 3 years or 60,000 km.
Dual PVS
The preload valve system has been further refined with a new dual preload valve design. This reduces damping force at high piston speeds, effectively minimizing unnecessary movement for improved stability and control.
Pillow upper mounts specially designed for the Corvette
Specially designed aluminum pillow upper mounts are used on both the front and rear.
Repeated strength testing has ensured optimal rigidity while reducing weight.
Application
| Engine | LT6 |
|---|---|
| Model Year | 20/01 - |
| Remarks |
Specification
| FRONT | REAR | |
|---|---|---|
| Damping force adjustment | 30 steps | 30 steps |
| Base valve | - | - |
| Height adjustable lower bracket | × | 〇 |
| Upper mount | Spherical bearing | Spherical bearing |
| Inverted/Normal type | Normal | Normal |
| Damper/Spring layout | Coilover | Coilover |
| Spring rate change at factory | Impossible | Possible |
| Damping force adjustment with wire | - | - |
| Helper spring (Spring rate N/mm) | - | 〇 (19.8) |
| Factory *2 | Test data | Adjustable range High - Low *3 |
Drivable range High - Low *4 |
||
|---|---|---|---|---|---|
| FRONT | Ride height *1 | 689 | ← | 696 ～ 668 | 696 ～ 668 |
| Against stock | -16 | ← | -9 ～ -37 | -9 ～ -37 | |
| REAR | Ride height *1 | 713 | ← | 738 ～ 689 | 738 ～ 689 |
| Against stock | -25 | ← | 0 ～ -49 | 0 ～ -49 | |
*1. Height from road surface to fender arch.
*2. Height at factory is the data tested at HKS with the setting of Full Kit. (HKS' recommended setting.)
*3. Adjustable range (However, the lowest value may not be road legal.
Even within the adjustable range, car body, arm etc. may contact. In such case, it will be hard to drive.
Damper oil leakage or any other problems caused by low ride height setting from the factory setting will void the warranty of the product.)
*4. Drivable range that there is no contact of car body or arms etc. (However, change of tire/wheel size may cause a problem.)
Caution). Actual data depends on each vehicle.
Kit information
Spring of Full Kit
| F | R | |
|---|---|---|
| Spring rate N/mm(kgf/mm) | 118 (12.0) | 128 (13.0) |
| Free height (mm) | - | 250 |
| Spring type | Special shape | 直巻き |
| Recommended range to change spring rate N/mm(kgf/mm) | - | ±10 ( 1 ) |
Specification of damper
| F | R | |
|---|---|---|
| Damping force (Rebound/Damping)N* | 866 / 275 | 824 / 280 |
| Default position of dial | 15 | 15 |
| Remaining damper stroke (Rebound/Damping)mm | 51 / 55 | 65 / 71 |
* The value of the damping force is at piston speed of 0.1m/sec.
Setting data
| F | R | |||||||
|---|---|---|---|---|---|---|---|---|
| Default | Test | Drivable limit High * |
Drivable limit Low * |
Default | Test | Drivable limit High * |
Drivable limit Low * |
|
| Length of case (mm) |
312 | ← | 312 | 312 | 378 | ← | 398 | 378 |
| Spring Set length(mm) |
- | - | - | - | 305 | ← | 305 | 324 |
| Length to ride hight adjuster (mm) |
28 | ← | 32 | 15 | 46 | ← | 66 | 27 |
| Lever ratio | 1.65 | 1.27 | ||||||
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.
Test vehicle information
| F | R | ||
|---|---|---|---|
| Vehicle weight kg | - (680) | - (1040) | |
| Tire size (Air pressure) kPa | 275 / 30 - 20 ( 210 ) | 345 / 25 - 21 ( 210 ) | |
| Wheel size | 10 JJ × 20 inset 35 | 13.0 JJ × 21 inset 40 | |
| Alignment (Toe/Camber) |
Test data | in 0°04' / -2°01' | in 0°05' / -1°57' |
| Standard value | in 0°06' ± 12' / -0°30' ± 36' | 0°00' / -0°30' ± 36' | |
* Test data at HKS.
Parts List * It may be changed without prior notice.
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