HKS CT9A 03-07 Evolution 8/9 Hipermax R Coilovers
HKS CT9A 03-06 Evolution 8/9 Hipermax R Coilovers
Experience the evolution of suspension technology with the HKS CT9A 03-06 Evolution 8/9 Hipermax R Coilovers. Born from the latest theories and refined through the success of the HIPERMAX IV SP, this suspension kit represents the pinnacle of performance and handling for your Evolution 8 or 9.
Key Features:
- Incorporates the latest suspension theories and HKS expertise
- Utilizes knowledge from the HIPERMAX S for exceptional evolution
- Equipped with new components and HKS know-how
- Transforms ride quality beyond conventional dampers
The HKS CT9A 03-06 Evolution 8/9 Hipermax R Coilovers are the result of meticulous engineering and relentless testing. This kit not only includes new parts but also harnesses the knowledge cultivated by HKS over the years. It's designed to elevate your Evolution's ride quality to extraordinary levels, going beyond what conventional dampers can offer.
At HKS, we leave no stone unturned. Testing at the iconic Fuji Speedway involved comprehensive evaluations, including the impact of bonded bracket bushings on the front and rear stabilizers. When adjusting ride height from stock conditions, the stabilizer's ability to absorb bush reaction forces becomes critical. We've rigorously tested three stabilizer settings, including the stock stabilizer with bonded bushings, stabilizer with detachable bushing, and the option to run without a stabilizer.
The test vehicle used was the "S Special Package" model, and we even adopted a strut tower bar from the "NR-A" model for additional testing. At Fuji Speedway, adjustments can be tailored to your preference, with five notches available for both front and rear tightening sides.
By installing front and rear retainers, we've minimized rate changes while compressing the spring and suppressed abrupt movement changes, ensuring a smoother and more controlled ride.
While our testing was conducted at a specific vehicle height, please note that interference with the inner fender may occur depending on factors such as tire size, model, or suspension alignment. Be sure to consider these factors when installing the HKS CT9A 03-06 Evolution 8/9 Hipermax R Coilovers.
Elevate your Evolution's suspension to a new level of performance with the HKS CT9A 03-06 Evolution 8/9 Hipermax R Coilovers. Order now and experience the evolution of HKS engineering!
Specification
| FRONT | REAR | |
|---|---|---|
| Damping force adjustment | 30 steps | 30 steps |
| Base valve | - | - |
| Height adjustable lower bracket | 〇 | 〇 |
| Upper mount | Spherical bearing | Spherical bearing |
| Inverted/Normal type | Inverted | Normal |
| Damper/Spring layout | Coilover | Coilover |
| Spring rate change at factory | Possible | Possible |
| Damping force adjustment with wire | - | - |
| Helper spring (Spring rate N/mm) |
〇 (19.8) |
〇 (4.7) |
| Factory *2 | Test data | Adjustable range High - Low *3 |
Drivable range High - Low *4 |
||
|---|---|---|---|---|---|
| FRONT | Ride height *1 | 651 | 639 | 694 ～ 619 | 694 ～ 619 |
| Against stock | -43 | -55 | 0 ～ -75 | 0 ～ -75 | |
| REAR | Ride height *1 | 641 | ← | 665 ～ 617 | 665 ～ 636 |
| Against stock | -25 | ← | -1 ～ -49 | -1 ～ -30 | |
*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) | 137 ( 14.0 ) | 137 ( 14.0 ) |
| Free height (mm) | 200 | 170 |
| Spring type | Straight | Straight |
| Recommended range to change spring rate N/mm(kgf/mm) | ±20 ( 2 ) | ±20 ( 2 ) |
Specification of damper
| F | R | |
|---|---|---|
| Damping force (Rebound/Damping)N* | 1790 / 559 | 912 / 461 |
| Default position of dial | 15 | 15 |
| Remaining damper stroke (Rebound/Damping)mm | 52 / 47 | 49 / 57 |
* 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) |
291 | 280 | 331 | 265 | 393 | ← | 411 | 389 |
| Spring Set length(mm) |
254 | ← | 254 | 258 | 224 | ← | 224 | 224 |
| Length to ride hight adjuster (mm) |
30 | 19 | 70 | 0 | 125 | ← | 143 | 121 |
| Lever ratio | 1.08 | 1.35 | ||||||
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.
Test vehicle information
| F | R | ||
|---|---|---|---|
| Vehicle weight kg | 889 (870) | 570 (540) | |
| Tire size (Air pressure) kPa | 255 / 35 - 18 ( 200 ) | 255 / 35 - 18 ( 200 ) | |
| Wheel size | 9.0 JJ × 18 inset 22 | 9.0 JJ × 18 inset 30 | |
| Alignment (Toe/Camber) |
Test data | out 1.4 mm / -4°30' | out 1.6 mm / -2°30' |
| Standard value | 0 ± 2 mm / -2°00' ± 30' | in 3 ± 2 mm / -1°00' ± 30' | |
* Test data at HKS.
Parts List * It may be changed without prior notice.
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 www.P65Warnings.ca.gov/passenger-vehicle.
HKS CT9A 03-07 Evolution 8/9 Hipermax R Coilovers
