1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Walker Quiet-Flow SS 70026 Direct Fit Exhaust Muffler Assembly. Please read these instructions carefully before proceeding with installation or any related procedures. Proper installation and maintenance ensure optimal performance and longevity of the product.
2. Product Overview and Features
The Walker Quiet-Flow SS 70026 is a direct-fit exhaust muffler assembly designed for specific Hyundai Tucson models. It features 100% stainless-steel construction for enhanced durability and corrosion resistance, offering a longer lifespan compared to typical aluminized mufflers. The design incorporates OE-style components for straightforward installation and premium acoustic control.




Key Features:
- 100% Stainless Steel Construction: Offers superior corrosion resistance and extended product life.
- Direct-Fit Design: Engineered for OE-style hangers, brackets, and pipe routings, ensuring a straightforward bolt-on installation.
- Durable Construction: Features internal partitions, mechanically joined tubes, spun-locked heads, and OE-style spot welds to minimize distortion and enhance stability.
- Premium Acoustic Control: OE-style louvered tubes and domed heads reduce noise levels for a factory-like sound.
- Design Validated: Acoustic and flow tested to ensure consistent quality and performance.
3. Safety Information
Working on vehicle exhaust systems can be hazardous. Always prioritize safety. It is recommended that installation be performed by a qualified automotive technician.
- Always wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and hearing protection.
- Ensure the vehicle is securely supported on jack stands or a lift before working underneath. Never rely solely on a jack.
- Allow the exhaust system to cool completely before beginning work to prevent burns.
- Use proper tools for the job.
- Be aware of potential hazards such as sharp edges, hot components, and falling debris.
- Do not modify the product. Any modifications may compromise its integrity and performance.
4. Setup and Installation
The Walker Quiet-Flow SS 70026 is designed as a direct-fit replacement. While designed for ease of installation, professional installation is highly recommended due to the specialized tools and safety considerations involved in exhaust system work.
Pre-Installation Steps:
- Verify that the part number 70026 matches your vehicle's requirements (Hyundai Tucson).
- Gather all necessary tools, including wrenches, sockets, penetrating oil, and a cutting tool if the old system needs to be cut.
- Ensure the vehicle is cool and safely elevated.
- Inspect the existing exhaust system for any additional damage or components that may need replacement (e.g., hangers, gaskets, clamps).
Installation Procedure (General Guidelines):
- Remove Old Muffler: Carefully remove the existing muffler assembly. This may involve unbolting flanges, cutting pipes, and detaching hangers. Use penetrating oil on rusted fasteners.
- Clean Mating Surfaces: Ensure all mating surfaces (flanges, pipe ends) are clean and free of rust or old gasket material.
- Install New Muffler: Position the new Walker Quiet-Flow SS 70026 muffler assembly. Align it with existing hangers and connection points.
- Secure Connections: Attach the muffler using new gaskets and bolts where applicable, or appropriate clamps. Do not fully tighten all fasteners until the entire system is properly aligned.
- Align System: Ensure the entire exhaust system is properly aligned, with adequate clearance from the vehicle's undercarriage and suspension components.
- Tighten Fasteners: Once aligned, progressively tighten all bolts and clamps to the manufacturer's recommended torque specifications.
- Final Inspection: Lower the vehicle and perform a final visual inspection for proper fitment, clearance, and secure connections.


5. Operating Characteristics
After installation, the Walker Quiet-Flow SS 70026 muffler assembly is designed to restore your vehicle's exhaust sound to an OE-like level, reducing excessive noise while maintaining proper exhaust flow. You should not experience any significant changes in vehicle performance or fuel economy directly attributable to the muffler, as it is designed to meet original equipment specifications.
6. Maintenance
The Walker Quiet-Flow SS muffler is constructed from stainless steel for durability and requires minimal specific maintenance. However, regular inspection of your entire exhaust system is recommended.
- Periodic Inspection: Annually or during routine vehicle service, inspect the muffler and entire exhaust system for signs of damage, corrosion, loose connections, or leaks.
- Check Hangers and Mounts: Ensure all exhaust hangers and mounting points are secure and in good condition. Replace any worn or broken hangers.
- Listen for Changes: Pay attention to any changes in exhaust sound, which could indicate a leak or damage.
7. Troubleshooting
If you encounter issues after installing your new muffler, consider the following common troubleshooting steps:
- Loud Exhaust Noise:
- Check for loose connections or clamps.
- Inspect for exhaust leaks at flanges or welds.
- Ensure all gaskets are properly seated and not damaged.
- Verify that the muffler or pipes are not contacting the vehicle's chassis or suspension.
- Rattling or Vibrations:
- Inspect exhaust hangers for damage or improper installation.
- Check for loose heat shields.
- Ensure the muffler or pipes are not touching other vehicle components.
- Exhaust Fumes in Cabin:
- Immediately check for severe exhaust leaks, especially near the engine or passenger compartment. This is a serious safety concern.

If troubleshooting steps do not resolve the issue, consult a qualified automotive technician.
8. Specifications
| Attribute | Detail |
|---|---|
| Brand | Walker |
| Model Name | Quiet-Flow SS |
| Item Model Number | 70026 |
| Manufacturer Part Number | 70026 |
| Vehicle Service Type | Car, Truck (Specific to Hyundai Tucson) |
| Shape | Round |
| Item Weight | 13 pounds |
| Product Dimensions (L x W x H) | 36.4 x 1 x 6.4 inches |
| Material | 100% Stainless Steel |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 086387700269 |
9. What's in the Box
Your package should contain the following item:
- One Walker Quiet-Flow SS 70026 Direct Fit Exhaust Muffler Assembly
10. Warranty and Support
For specific warranty information regarding your Walker Quiet-Flow SS 70026 muffler assembly, please refer to the official Walker website or contact their customer service directly. Warranty terms and conditions may vary.
For technical support or further assistance, please contact Walker customer service through their official channels.





