1. Introduction
This manual provides detailed instructions for the installation, setup, operation, and maintenance of your HKS Hipermax S Series Coilovers, Model 80300-AN009. These coilovers are specifically designed for the 2009 and later Nissan 370Z with the VQ37VHR engine, offering enhanced performance and adjustable ride characteristics.
The HKS Hipermax S Series represents a new generation of suspension, combining advanced technology with HKS's extensive racing experience to deliver superior handling, ride comfort, and durability. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Image 1.1: Overview of HKS Hipermax S Series Coilovers components, including front and rear shock absorbers with springs, and adjustment tools.
2. Safety Information
Warning: Installation of suspension components should only be performed by qualified professionals with appropriate tools and safety equipment. Improper installation can lead to serious injury or vehicle damage.
- Always use jack stands to support the vehicle when working underneath it.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure all fasteners are tightened to the manufacturer's specified torque values.
- After installation, perform a thorough inspection and a test drive in a safe area to confirm proper operation.
- Regularly inspect suspension components for wear, damage, or loose fasteners.
This product is intended for off-road or track use in some regions. Check local laws and regulations regarding vehicle modifications.
3. Package Contents
Before beginning installation, please verify that all components listed below are present and in good condition. Refer to the diagram for visual confirmation.
Image 3.1: Diagram illustrating the complete list of components included in the HKS Hipermax S Series Coilovers kit.
| Item | Quantity |
|---|---|
| Front Suspension ASSY | 2 |
| Rear Shock Absorber ASSY | 2 |
| Rear Spring | 2 |
| Ride Height Adjuster ASSY | 2 |
| Seat | 2 |
| Damping Force Adjustment Dial | 1 |
| Bolt (M12) | 2 |
| Hook Wrench (with 12.7Sq hole) | 1 |
| Washer | 2 |
| Hook Wrench | 1 |
| Spacer | 4 |
| Warranty Card | 1 |
| Flange Nut (M12) | 2 |
| Instruction Manual (This document) | 1 |
| Grommet | 2 |
4. Installation
This section outlines the general procedure for installing the HKS Hipermax S Series Coilovers. Always refer to a service manual for your specific vehicle (Nissan 370Z) for detailed removal and installation steps of OEM suspension components.
Image 4.1: Detailed configuration diagram for the HKS Hipermax S Series front and rear suspension assemblies, showing individual components and their arrangement.
4.1 General Installation Steps
- Preparation: Lift the vehicle safely and support it with jack stands. Remove wheels.
- OEM Suspension Removal: Carefully remove the original front and rear suspension assemblies according to the vehicle service manual.
- Coilover Assembly: Assemble the HKS Hipermax S Series Coilovers. Pay close attention to the orientation of components like the bump stop plate (ensure the grooved/concave side faces the C-ring).
- Installation: Install the new HKS coilover assemblies into the vehicle. Ensure all mounting points are correctly aligned.
- Tightening: Tighten all bolts and nuts to the specified torque values.
- Upper Mount Flange Nut: 25 N·m
- Front Spring Lock Nut: 50 N·m
- Front Bracket Lock Nut: 50 N·m
- Rear Flange Nut (M12): 123 N·m
- Rear Spring Lock Nut: 60 N·m
- Initial Ride Height Adjustment: Perform an initial ride height adjustment as described in Section 5.1.
- Final Checks: Reinstall wheels, lower the vehicle, and perform a final inspection of all installed components.
Note: The illustrations in this manual are for reference. Actual product shapes and specific vehicle mounting points may vary slightly. Ensure the protrusion and valley of the protrusion on the bracket are adjusted to be 90° to the sleeve case for proper ride height adjustment.
5. Setup and Adjustment
The HKS Hipermax S Series Coilovers offer extensive adjustability to fine-tune your vehicle's handling and ride comfort. Key features include a monotube design, inverted type for straight-type shocks, Dual PVS, WR Needle damping adjustment, Advanced Bump Rubber, PNE Coat, and reinforced rubber upper mounts.
Image 5.1: Visual representation of key features of the HKS Hipermax S Series Coilovers, including internal components and design elements, alongside warranty details.
5.1 Ride Height Adjustment (Full Length Adjustable)
The Hipermax S Series features full-length adjustability, allowing you to change the vehicle's ride height without altering spring preload. This ensures optimal suspension travel regardless of ride height.
- Loosen the spring lock nut and the bracket lock nut using the supplied hook wrenches.
- Rotate the lower bracket to adjust the overall length of the coilover. Turning the bracket clockwise will lower the vehicle, and counter-clockwise will raise it.
- Once the desired ride height is achieved, tighten both the spring lock nut and the bracket lock nut to their specified torque values (50 N·m for front, 60 N·m for rear spring lock nut).
- Ensure the vehicle is on a level surface and measure the ride height at all four corners. Adjust as necessary to achieve an even stance.
5.2 Damping Force Adjustment (30-Step)
The coilovers feature a 30-step damping force adjustment mechanism (WR Needle) to fine-tune rebound and compression characteristics. This allows for a wide range of settings from soft for comfortable street driving to firm for aggressive track use.
- Locate the damping force adjustment dial at the top of the front shock absorbers and at the bottom of the rear shock absorbers.
- Turn the dial clockwise for firmer damping and counter-clockwise for softer damping. Each click represents one step of adjustment.
- Start with a recommended setting (e.g., 15 clicks from full stiff) and adjust incrementally based on driving conditions and personal preference.
- Always adjust both left and right sides equally to maintain balanced handling.
6. Operating Guidelines
After installing and setting up your HKS Hipermax S Series Coilovers, it is important to understand how they affect your vehicle's dynamics.
- Break-in Period: Allow for a break-in period of approximately 500-1000 miles (800-1600 km) for the suspension components to settle. During this time, avoid aggressive driving and extreme adjustments.
- Alignment: After any ride height adjustment, a professional wheel alignment is crucial to ensure proper handling, tire wear, and safety.
- Driving Style: Be aware that lowering your vehicle can reduce ground clearance. Exercise caution over speed bumps, potholes, and uneven terrain.
- Seasonal Adjustments: You may wish to adjust damping force settings for different seasons or driving conditions (e.g., softer for winter, firmer for summer performance).
Image 6.1: A Nissan 370Z equipped with HKS Hipermax S Series Coilovers, demonstrating the lowered and enhanced stance of the vehicle.
7. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your HKS Hipermax S Series Coilovers.
- Cleaning: Periodically clean the coilovers, especially after driving in harsh conditions (e.g., snow, salt, dirt). Use mild soap and water, then rinse thoroughly. Avoid high-pressure washers directly on seals.
- Inspection: Regularly inspect for signs of wear, damage, or leaks. Check for loose bolts, nuts, or worn bushings.
- Thread Lubrication: Apply a thin layer of anti-seize lubricant to the threaded sections of the shock body and ride height adjusters annually to prevent seizing, especially if you plan to make adjustments. The PNE Coat helps prevent rust and seizing.
- Overhaul: HKS Hipermax S Series Coilovers are designed to be overhaulable. If you notice a significant decrease in performance, persistent noise, or fluid leaks, consider having them professionally inspected and overhauled by an authorized HKS service center.
8. Troubleshooting
This section addresses common issues you might encounter with your coilovers.
| Symptom | Possible Cause | Solution |
|---|---|---|
| Uneven Ride Height | Incorrect ride height adjustment; uneven spring preload; vehicle not on level ground during measurement. | Re-measure and adjust ride height on a level surface. Ensure spring lock nuts and bracket lock nuts are tightened correctly. |
| Clunking/Rattling Noise | Loose mounting bolts; worn bushings; spring coil bind; foreign object. | Inspect all mounting points and tighten to specifications. Check for damaged bushings or contact between components. |
| Harsh Ride | Damping force set too stiff; excessive spring preload; incorrect tire pressure. | Adjust damping force to a softer setting. Verify spring preload is within recommended range. Check tire pressure. |
| Excessive Body Roll | Damping force set too soft; insufficient spring rate for driving style. | Adjust damping force to a firmer setting. If issue persists, consult a professional for spring rate assessment. |
| Fluid Leak from Shock Absorber | Damaged seal; internal component failure. | This indicates a serious issue. Stop driving immediately and contact an authorized HKS service center for inspection and overhaul. |
If you encounter an issue not listed here or if the suggested solutions do not resolve the problem, please contact HKS customer support or a qualified suspension specialist.
9. Specifications
Below are the general specifications for the HKS Hipermax S Series Coilovers, Model 80300-AN009.
- Model Number: 80300-AN009
- Compatibility: 2009+ Nissan 370Z (VQ37VHR)
- Suspension Type: Full-length adjustable, Monotube, Inverted (front)
- Damping Adjustment: 30-step (WR Needle)
- Approximate Item Weight: 50 pounds (22.68 kg)
- Approximate Product Dimensions: 64.2 x 27.9 x 19.6 inches (163.07 x 70.87 x 49.78 cm)
- Manufacturer: HKS
Note: Spring rates and specific ride height ranges are typically provided in supplementary documentation or on the HKS official website for precise tuning.
10. Warranty and Support
HKS stands behind the quality and durability of its products.
10.1 Warranty Information
The HKS Hipermax S Series Coilovers come with a 3-year or 60,000 kilometer (whichever comes first) warranty. This warranty covers manufacturing defects and ensures the product meets HKS's high standards for durability and performance. Please retain your proof of purchase for warranty claims.
The coilovers are also designed to be overhaulable, allowing for extended lifespan and continued peak performance through professional servicing.
10.2 Customer Support
For technical assistance, warranty claims, or inquiries regarding overhaul services, please contact HKS customer support through their official website or your authorized HKS dealer. Provide your product model number (80300-AN009) and purchase details when seeking support.
