BORLA 60521 Performance Exhaust Over Axle Pipes Installation Manual
For 2011-2014 Ford Mustang GT 5.0L V8 / Shelby GT500 5.4L V8 (Automatic/Manual Transmission)
Introduction
This manual provides essential instructions for the proper installation, operation, and maintenance of your BORLA 60521 Performance Exhaust Over Axle Pipes. Adherence to these guidelines will ensure optimal performance and longevity of the product. Please read all instructions carefully before beginning installation.
Product Overview
The BORLA 60521 Performance Exhaust Over Axle Pipes are designed to enhance the exhaust system of compatible Ford Mustang models. Key features include:
- T-304 Stainless Steel Construction: Ensures durability and corrosion resistance.
- Bolt-On Installation: Designed for straightforward installation without welding.
- All Welded Construction: Provides structural integrity and a secure fit.
- Made In USA: Manufactured to high-quality standards.
What's in the Box:
- Connecting Pipes (BORLA 60521 Over Axle Pipes)
Compatibility
This product is compatible with the following vehicle models:
- Vehicle Service Type: Car
- Make: Ford
- Models: Mustang GT 5.0L V8, Shelby GT500 5.4L V8
- Years: 2011, 2012, 2013, 2014
- Transmission: Automatic and Manual
Setup and Installation
Installation of the BORLA 60521 Over Axle Pipes is a bolt-on process. Professional installation is recommended. Ensure the vehicle is cool before starting. Always use appropriate safety equipment, including eye protection and gloves.
General Installation Steps:
- Prepare Vehicle: Park the vehicle on a level surface. Engage the parking brake. For safety, disconnect the negative terminal of the vehicle's battery.
- Lift Vehicle: Safely raise the vehicle using a lift or jack stands to provide adequate working space underneath. Ensure the vehicle is stable.
- Locate Existing Over Axle Pipes: Identify the factory over axle pipes that will be replaced.
- Remove Factory Pipes: Carefully unbolt and remove the existing over axle pipes. Support the exhaust system to prevent it from falling. Retain any reusable hardware if instructed by specific Borla documentation (not provided here).
- Install BORLA Pipes: Position the new BORLA 60521 Over Axle Pipes into place. Loosely attach them using the provided hardware or compatible factory hardware. Do not fully tighten at this stage.
- Align and Adjust: Ensure proper alignment and clearance with other vehicle components. Adjust the pipes for optimal fit and appearance, especially the exhaust tips.
- Tighten Hardware: Once aligned, progressively tighten all bolts and clamps to the manufacturer's specified torque settings.
- Inspect: Double-check all connections for tightness and ensure there are no leaks. Verify clearance around all components.
- Lower Vehicle: Safely lower the vehicle.
- Reconnect Battery: Reconnect the negative battery terminal.

This image displays the rear of a red Ford Mustang, highlighting the installed BORLA Performance Exhaust Over Axle Pipes. The polished exhaust tips are visible beneath the bumper, indicating the completed installation.
Operating Characteristics
Upon installation, the BORLA 60521 Over Axle Pipes contribute to the overall exhaust sound and performance of your vehicle. Expect a distinct, enhanced exhaust note, often described as the "Classic BORLA Sound." This product is designed to optimize exhaust flow, which can contribute to improved engine efficiency and power delivery.
Maintenance
To ensure the longevity and continued performance of your BORLA exhaust components, follow these maintenance guidelines:
- Regular Inspection: Periodically inspect the entire exhaust system for any signs of damage, loose connections, or corrosion. Check for exhaust leaks, especially at connection points.
- Cleaning: Clean the exterior of the pipes and tips regularly with a mild automotive cleaner and a soft cloth to maintain their appearance. Avoid abrasive cleaners that could damage the stainless steel finish.
- Hardware Check: Ensure all bolts and clamps remain tight. Re-torque if necessary, especially after the first few hundred miles of driving.
Troubleshooting
If you encounter issues after installation, consider the following:
- Rattling or Vibrations: This often indicates contact between the exhaust system and the vehicle's chassis or other components. Re-check alignment and clearances. Ensure all hangers are properly seated and not damaged.
- Exhaust Leaks: Listen for hissing sounds, especially when the engine is cold. Leaks usually occur at connection points. Re-tighten clamps and bolts. If leaks persist, inspect gaskets or seals for damage.
- Unusual Noises: If the exhaust sound is different than expected, verify that all components are securely installed and that there are no obstructions or damage to the pipes.
Specifications
| Attribute | Detail |
|---|---|
| Model Number | 60521 |
| Brand | Borla |
| Material | T-304 Stainless Steel |
| Color | Silver |
| Installation Type | Bolt-On |
| Item Weight | 5 pounds |
| Manufacturer Part Number | 60521 |
| UPC / GTIN | 808422605212 |
| Included Components | Connecting Pipes |
Warranty Information
This product is covered by a manufacturer warranty. For specific details regarding coverage, duration, and claims process, please refer to the official warranty documentation provided by BORLA or visit the manufacturer's website.
Customer Support
For technical assistance, installation questions, or warranty inquiries, please contact BORLA customer support directly. Refer to the contact information available on the official BORLA website or product packaging.







