maXpeedingrods HV95RO
maXpeedingrods Coilovers (Model HV95RO) - Instruction Manual
For Dodge Charger/Challenger RWD (2011-2022) & Chrysler 300 RWD (2011-2023)
1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your maXpeedingrods Coilovers. Please read these instructions thoroughly before beginning any work to ensure proper function and safety. These coilovers are designed to enhance vehicle handling and allow for adjustable ride height.
2. Safety Guidelines
WARNING: Improper installation or adjustment can lead to serious injury or vehicle damage. Professional installation is highly recommended.
- Always use appropriate safety equipment, including eye protection and gloves.
- Ensure the vehicle is securely supported on jack stands or a lift before working underneath.
- Do not modify any components of the coilover kit.
- Verify all bolts and nuts are tightened to manufacturer specifications.
- After installation, perform a wheel alignment.
- Do not operate the vehicle with loose or improperly installed suspension components.
3. Package Contents
Please verify all items are present before beginning installation:

Image: Contents of the maXpeedingrods Coilover kit, including front and rear coilovers, spring kits, and C spanners.
- 2x Front Coil-overs
- 2x Rear Shock Absorbers
- 2x Rear Spring Kits
- 2x C Spanners (for height adjustment)
4. Vehicle Compatibility
These coilovers are compatible with the following Rear-Wheel Drive (RWD) vehicles:
- Dodge Challenger RWD: 2011-2022
- Dodge Charger RWD: 2011-2022
- Chrysler 300 RWD: 2011-2023
Note: These coilovers are not compatible with vehicles equipped with electronic suspension.
5. Key Features
The maXpeedingrods Coilover Suspension Kit offers several features designed for performance and durability:
- High Tensile Springs: Front: 12kg/mm (672lbs/in), Rear: 14kg/mm (784lbs/in). Tested for over 600,000 continuous cycles with less than 0.04% distortion. Special surface treatment enhances durability and performance.
- Adjustable Ride Height: Allows for a 1-3 inch lowering range (not designed to maintain original ride height), providing a more aggressive stance and improved steering response.
- 6061 Aluminum Alloy with T6: Used for increased hardness, high strength, and durability in precision parts.
- Pillow Ball Top Mount: Provides sharp and precise handling.

Image: Close-up of the pillow ball top mount, indicating its role in precise handling.
- CNC Billet Aluminum Perches and Locking Rings: High-quality hardware for secure adjustments.

Image: Detail of the CNC billet aluminum perches and locking rings on the coilover body.
- High Rigid Piston Rod: Features a 22mm front rod diameter and high-frequency heat treatment for enhanced rigidity and toughness, ensuring a long-lasting rod lifetime.

Image: Cross-section view highlighting the 22mm front rod diameter and high rigid piston rod.
- Comprehensive Component Overview:

Image: Detailed diagram labeling various components including Pillow Ball Top Mount, Upper Spring Seat with Radial Bearing, High Rigidity 55CrSi Steel Cold-Bent Coil Springs, Anodized Shock Body with Anti-Corrosion Coating, Powder-Coated Lower Mount, 6061-T6 AL Perch, and Full-Length Dust Boot.
6. Setup & Installation
This section provides general guidance for assembling and installing your coilovers. For detailed vehicle-specific instructions, consult a professional mechanic or your vehicle's service manual.
6.1. Coilover Assembly
The following video demonstrates the general assembly process for coilovers. Ensure all components are clean and free of debris before assembly.
Video: "How to Assemble Coilover" - This video provides a step-by-step guide on assembling the individual components of a coilover unit, including the spring seat, upper and lower lock rings, dust boot, spring, and top mount.
- Begin by placing the spring seat onto the damper body.
- Follow with the upper locker and then the lower locker, ensuring they are correctly oriented.
- Install the ring, followed by the dust boot, ensuring it covers the piston rod.
- Carefully slide the main spring onto the damper body.
- Place the plate and then the ring on top of the spring.
- Attach the top mount, securing it with the washer and locking nut.
- Adjust the spring preload to the correct setting and lock it tight using the provided C spanners.
- If applicable, install the adjuster cover on the top mount.
6.2. Vehicle Installation
The following videos illustrate aspects of coilover installation and the benefits of upgraded suspension. While specific to certain models, the general process and component handling are relevant.
Video: "T6 Upgrade Coilovers for Comfortable Driving" - This video showcases the T6 series coilovers, including brief clips of installation and the vehicle in motion, highlighting improved comfort and handling.
Video: "COT6 Serie Coilover" - This video provides a comparison between OEM and COT6 coilovers, demonstrating installation steps and highlighting features like the adjustment knob, warning line, and extended dust cover.
- Safely lift and support the vehicle. Remove the wheels.
- Remove the original suspension components.
- Install the new coilover assembly into the vehicle's suspension mounts.
- Secure all mounting bolts and nuts, ensuring proper torque specifications are met.
- Repeat for all four wheels.
- Lower the vehicle and perform a preliminary visual inspection.
- It is highly recommended to have a professional wheel alignment performed after installation.
7. Operating & Adjustment
Your maXpeedingrods Coilovers allow for precise adjustments to customize your vehicle's ride and handling characteristics.
7.1. Height Adjustment
The ride height can be adjusted to your preference, typically within a 1-3 inch lowering range. Use the provided C spanners for this adjustment.

Image: Diagram illustrating the process of adjusting coilover height by loosening lock rings and rotating the lower mount.
- Loosen the lower mount (A) and the locking ring (B) using the C spanners.
- Rotate the lower mount to increase or decrease the thread distance, thereby changing the ride height.
- Once the desired height is achieved, tighten the lower mount (A) and the locking ring (B) securely.
Important: Ensure both sides of the vehicle are adjusted evenly to maintain proper balance and handling.
7.2. Damping Adjustment
These coilovers feature preset damping shock absorbers. While not explicitly stated as user-adjustable in the product description, some maXpeedingrods models offer damping adjustment. If your specific model includes an adjustment knob on the top mount, refer to the separate damping adjustment guide or consult a professional for optimal settings.
Video: "B1 coilovers for height adjustable" - This video, while showing the B1 series, demonstrates the concept of height adjustment for coilovers.
8. Care and Maintenance
- Regularly inspect coilovers for any signs of damage, leaks, or loose components.
- Keep the coilover threads clean to ensure smooth height adjustments.
- Periodically check the torque of all mounting hardware.
- Avoid using harsh chemicals for cleaning; mild soap and water are sufficient.
- If any unusual noises or changes in ride quality occur, have the suspension inspected by a qualified technician.
9. Troubleshooting
This table outlines common issues and potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unusual noises (clunking, squeaking) | Loose mounting hardware, worn bushings, improper spring preload. | Check and tighten all bolts. Inspect bushings for wear. Adjust spring preload. |
| Poor ride quality (too stiff/soft) | Incorrect spring preload, improper damping settings (if adjustable). | Adjust spring preload. If applicable, adjust damping settings. |
| Uneven ride height | Uneven height adjustment, damaged component. | Re-measure and adjust height on all coilovers. Inspect for damage. |
| Oil leaks from damper | Damaged seal or damper body. | Contact customer support for replacement or repair. |
10. Product Specifications
| Feature | Detail |
|---|---|
| Brand | maXpeedingrods |
| Model Number | HV95RO |
| Application | Dodge Charger/Challenger RWD (2011-2022), Chrysler 300 RWD (2011-2023) |
| Front Spring Rate | 12 kg/mm (672 lbs/in) |
| Rear Spring Rate | 14 kg/mm (784 lbs/in) |
| Height Adjustment Range | 1-3 inches lower than stock (not for original ride height) |
| Material | 6061 Aluminum Alloy (T6), 55CrSi Steel (springs) |
| Damping | Preset Shock Absorber Struts |
| Item Weight | 68.8 pounds |
| Product Dimensions | 28.03 x 20.24 x 7.95 inches |
11. Warranty and Customer Support
For warranty information, technical assistance, or any questions regarding your maXpeedingrods Coilovers, please contact maXpeedingrods customer support. They offer 24/7 customer service and support.
You can typically find contact information on the official maXpeedingrods website or through your purchase platform.
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