Cusco Strut Bar Oval Shaft Type OS (Rear) Instruction Manual

1. Product Overview

The Cusco Type OS Rear Strut Bar is designed to enhance vehicle handling and ride comfort by connecting the left and right mounting points of the rear suspension. This connection increases suspension rigidity, allowing the suspension to operate more precisely and resulting in sharper handling. It also helps suppress unnecessary body flex, improving overall ride quality.

Image 1.1: Cusco Type OS Rear Strut Bar. This image shows the strut bar's polished oval shaft and mounting brackets, typically installed in the rear of a vehicle to connect the suspension towers.

2. Vehicle Compatibility

This Cusco Type OS Rear Strut Bar (Model: 699 541 A) is compatible with the following Subaru models:

• Subaru XV (GT2, GT3, GT6, GT7)
• Subaru Impreza Sport (GT2, GT3, GT6, GT7)

Before purchase and installation, please verify your vehicle's model type, engine type, drive system, year, and grade using your vehicle inspection certificate or compliance plate. For detailed compatibility information, please refer to the official Cusco manufacturer's website:

Cusco Strut Bar Catalog

3. Setup and Installation

Installation of the Cusco Type OS Rear Strut Bar typically involves mounting it to the top of the rear suspension towers. While designed for relatively straightforward installation, professional installation is recommended to ensure proper fitment and safety.

3.1 Required Tools (Not Included)

• Socket wrench set
• Torque wrench
• Basic hand tools (e.g., pliers, screwdrivers)

3.2 Installation Steps

1. Safety First: Ensure the vehicle is parked on a level surface, the parking brake is engaged, and the engine is off. For rear suspension work, it may be necessary to lift the vehicle using a jack and secure it with jack stands.
2. Locate Mounting Points: Identify the rear suspension tower mounting points in the vehicle's trunk area. These are typically covered by trim panels which may need to be removed.
3. Prepare Mounting Surfaces: Clean any dirt or debris from the suspension tower mounting surfaces.
4. Position Strut Bar: Carefully place the Cusco strut bar into position, aligning the mounting holes on the bar's brackets with the vehicle's suspension tower bolts.
5. Secure Bolts: Install the provided bolts (or reuse existing ones if specified by Cusco) and hand-tighten them.
6. Torque to Specification: Using a torque wrench, tighten all bolts to the manufacturer's specified torque settings. Refer to your vehicle's service manual or Cusco's detailed installation guide for exact torque values. Over-tightening or under-tightening can lead to damage or unsafe conditions.
7. Reinstall Trim: Reinstall any removed trim panels.
8. Final Check: Double-check all connections to ensure they are secure before operating the vehicle.

Note: This is a general guide. Always refer to the specific installation instructions provided by Cusco with your product for detailed, model-specific steps and safety precautions.

4. Operating Considerations

Once installed, the Cusco Type OS Rear Strut Bar operates passively to improve chassis rigidity. There are no active controls or adjustments required by the user during vehicle operation.

4.1 Expected Performance Changes

• Improved Handling: Expect a more direct and responsive steering feel, especially during cornering.
• Reduced Body Roll: The vehicle's body roll may be reduced, contributing to a flatter stance during turns.
• Enhanced Ride Comfort: By minimizing chassis flex, the suspension can work more effectively, potentially leading to a more composed ride over uneven surfaces.

These changes are generally subtle but contribute to a more connected and controlled driving experience.

5. Maintenance

The Cusco Type OS Rear Strut Bar requires minimal maintenance. Regular inspection is recommended to ensure its continued performance and safety.

5.1 Inspection Schedule

• Every 6 months or 10,000 km (whichever comes first): Visually inspect the strut bar and its mounting points.
• After any significant impact or off-road driving: Perform an immediate inspection.

5.2 Inspection Points

• Mounting Bolts: Check that all mounting bolts are tight and have not loosened. Re-torque if necessary to manufacturer specifications.
• Bar Condition: Inspect the bar for any signs of damage, cracks, bends, or corrosion.
• Bracket Condition: Check the mounting brackets for any deformation or damage.

If any damage is found, contact Cusco support or a qualified automotive technician for assessment and replacement if needed.

6. Troubleshooting

The Cusco Type OS Rear Strut Bar is a passive component and typically does not cause operational issues. Most problems are related to installation.

If troubleshooting steps do not resolve the issue, contact Cusco customer support or a certified automotive technician.

7. Specifications

8. Warranty Information

This product conforms to the manufacturer's warranty. For specific details regarding warranty coverage, duration, and claims procedures, please refer to the warranty documentation included with your purchase or visit the official Cusco website.

Typically, manufacturer warranties cover defects in materials and workmanship under normal use. Damage resulting from improper installation, misuse, accidents, or unauthorized modifications may not be covered.

9. Customer Support

For technical assistance, installation inquiries, or warranty claims, please contact Cusco customer support directly.

• Official Website: http://www.cusco.co.jp/
• Product Catalog (Strut Bars): http://www.cusco.co.jp/catalog/body/strut_bar.html

When contacting support, please have your product model number (699 541 A) and purchase information readily available.