The MaXpeedingrods-B2 coil-overs represent an entry-level suspension upgrade designed for street use, particularly for performance-oriented drivers seeking a lowered stance and enhanced handling characteristics. Tailored for the 2005–2007 Subaru Impreza WRX STI (GDF chassis), these coil-overs feature height adjustment, adjustable camber plates (on applicable models), and a twin-tube structure to improve stability and control. This article provides a detailed breakdown of the installation process, technical specifications, and key features of the MaXpeedingrods-B2 coil-overs, based exclusively on the provided source material.
Technical Specifications and Design Features
The MaXpeedingrods-B2 coil-overs are engineered with a balance of performance and adjustability, making them suitable for daily drivers seeking a more aggressive driving experience. Below are the key specifications and design features as outlined in the source material:
- Spring Rates:
- Front: 9 kg/mm (504 lbs/in)
- Rear: 7 kg/mm (392 lbs/in)
- Spring Lengths:
- Front: 190 mm
- Rear: 250 mm
- Recommended Preload: 7–10 mm
- Adjustable Height Range: 25–75 mm, depending on the vehicle model
- Front Top Mount: Pillow ball with camber plate
- Rear Top Mount: Pillow ball
- Adjustable Damping: Not available
- Adjustable Camber: Available (on applicable models)
- Material Construction:
- CNC-machined aluminum top mounts and lockers
- Heavy-duty steel lower mounts
- Protective Elements:
- Fitted long rubber boots for damper protection
- Corrosion-resistant finish (anodized aluminum and powder-coated carbon steel)
- Structure: Twin-tube design for enhanced handling and control
These specifications indicate that the coil-overs are built for durability and performance, with a focus on improving handling dynamics while offering adjustability for stance and alignment. The inclusion of a camber plate and pillow ball system enhances steering response, which is particularly beneficial for drivers who prioritize cornering precision.
Installation Overview
The installation process for the MaXpeedingrods-B2 coil-overs involves several critical steps, primarily focused on the removal of the factory suspension components and the secure mounting of the new coil-overs. Although the source material does not provide a detailed, step-by-step installation manual, the following general guidance can be inferred based on the components included and the technical specifications:
1. Preparation and Tools Required
The package includes the following tools for installation:
- 1x Allen wrench
- 2x C spanners
These tools are essential for loosening and tightening the suspension mounting bolts. Additional tools may be required depending on the vehicle’s existing suspension configuration and the level of access to the components.
Before beginning the installation, it is recommended to:
- Ensure the vehicle is safely jacked up and supported with jack stands.
- Remove the wheels to gain better access to the suspension components.
- Clean the suspension area to avoid debris or dirt from interfering with the new coil-overs.
2. Removing Factory Suspension Components
The installation begins with the removal of the factory struts and springs. This typically involves:
- Loosening and removing the upper and lower suspension bolts.
- Supporting the weight of the suspension with a spring compressor or by carefully lowering the vehicle onto the coil-overs.
- Removing the old spring and strut assembly.
It is important to note that the MaXpeedingrods-B2 coil-overs are designed as a direct replacement for the factory components, so no major modifications to the suspension geometry should be necessary. However, due to the adjustable height feature, it may be necessary to adjust the ride height after installation to achieve the desired stance.
3. Mounting the New Coil-overs
Once the factory suspension is removed, the new coil-overs can be installed. The installation involves:
- Positioning the coil-over in the upper and lower suspension mounts.
- Securing the coil-over with the included bolts and lockers.
- Ensuring the pillow ball and camber plate (on applicable models) are properly seated and adjusted.
The camber plate allows for fine-tuning of the wheel alignment, which can improve tire contact with the road and enhance cornering performance. The pillow ball design reduces play and increases precision in the suspension system.
4. Adjustment and Final Checks
After the coil-overs are installed, it is important to:
- Adjust the ride height according to the desired lowering range (25–75 mm).
- Adjust the spring preload as recommended (7–10 mm).
- Check all mounting bolts for proper torque and tightness.
- Reinstall the wheels and lower the vehicle.
A test drive is recommended to ensure the suspension is functioning correctly and to fine-tune any adjustments as needed. It is also advisable to have the vehicle’s alignment checked after installation, especially if the camber plate was used.
Compatibility and Application
The MaXpeedingrods-B2 coil-overs are specifically designed for the 2005–2007 Subaru Impreza WRX STI (GDF chassis) with a RIM P.C.D. of 114.3 mm. This ensures that the coil-overs are a direct fit for this particular model without requiring modifications to the wheel hubs or suspension geometry.
The product is also designed with a blue body and black spring, which provides a distinctive aesthetic appeal while maintaining functional performance. The inclusion of a 645020 cm package dimension and a total weight of 30,500 g is relevant for shipping and handling considerations.
Performance and Handling Considerations
The twin-tube structure of the MaXpeedingrods-B2 coil-overs contributes to improved handling and control by providing better damping characteristics than single-tube systems. This is particularly beneficial in a variety of driving conditions, including both daily commuting and spirited driving.
The adjustable height feature allows users to lower the vehicle’s center of gravity, which reduces body roll and enhances stability. However, it is important to note that lowering the vehicle too much can affect ground clearance and may lead to increased suspension stress, especially on rough or uneven road surfaces.
The adjustable camber plate, when applicable, enables the user to fine-tune the wheel alignment, which can improve tire wear and cornering performance. The pillow ball top mount further enhances steering response by reducing lateral movement and increasing precision in the suspension system.
Safety and Durability
The MaXpeedingrods-B2 coil-overs are constructed with high-tensile springs that have undergone 600,000 cycles of continuous testing to ensure their strength and durability. This level of testing suggests that the coil-overs are capable of withstanding repeated use under normal driving conditions.
The use of CNC-machined aluminum top mounts and lockers contributes to the overall weight savings while maintaining structural integrity. The heavy-duty steel lower mounts are designed for high durability and reliability, ensuring long-term performance.
Additionally, the fitted long rubber boots help protect the damper from dirt, debris, and moisture, which can extend the lifespan of the coil-overs and maintain their performance over time.
Customer Support and Additional Features
The source material references an official support channel for customer assistance, indicating that users can access technical support for installation or product-related inquiries. This can be particularly useful for those unfamiliar with suspension modifications or for troubleshooting any issues that may arise post-installation.
The product is also associated with a curated automotive content community, which may provide a platform for enthusiasts to share experiences, discuss modifications, and stay updated on the latest trends in automotive performance.
The mention of smart control features, such as the remote management of home devices like air heaters and inverter generators, appears to be unrelated to the coil-overs themselves and may be part of a broader marketing strategy or unrelated content within the source material.
Conclusion
The MaXpeedingrods-B2 coil-overs are an entry-level suspension upgrade designed for the 2005–2007 Subaru Impreza WRX STI. With adjustable height, a twin-tube design, and the inclusion of camber plates on applicable models, these coil-overs offer enhanced handling, improved steering response, and a more aggressive stance. The installation process requires basic tools and mechanical knowledge, but the product is designed as a direct replacement, minimizing the need for additional modifications.
Users should carefully consider the lowering range and adjust the spring preload according to the manufacturer’s recommendations to ensure optimal performance and safety. The product is built with durable materials and has been tested for reliability, making it a viable option for drivers seeking to enhance their vehicle’s dynamics without compromising on quality or adjustability.