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This universal Borla performance muffler is selected by exact manufacturer part number 401664. Confirm every inlet, outlet, body, offset, clearance, finish, and fabrication requirement against the Borla drawing before ordering.
Key Features
- T-304 Austenitic Stainless Steel: Resists rust completely for long-term reliability in harsh environments.
- Free Flow Design: Boosts horsepower and torque by reducing backpressure.
- CFF Acoustic Material: High-temperature fiber controls sound while maintaining flow.
- 100% Welded Construction: Delivers maximum strength without weak points.
- T-304 stainless steel in natural mill finish; polish or brush for custom look, resists corrosion fully.
- Natural mill finish; brush or polish surface before install.
Fitment
| Fitment Basis | Universal by exact dimensions, exhaust-system interface, and intended function |
|---|---|
| Required Verification | Confirm inlet, outlet, body dimensions, offset, clearance, material, finish, and fabrication requirements |
Specifications
| Manufacturer | Borla |
|---|---|
| Manufacturer Part Number | 401664 |
| Product Type | Muffler |
| Sound Profile | S-Type |
| Inlet or Outlet Size | 2.75in, 6.75in, 24in, 29in |
| Fitment Type | Universal by exact dimensions and exhaust-system interface |
What's Included
One new Borla product identified by manufacturer part number 401664. Clamps, hangers, gaskets, tips, pipes, tools, and companion parts are included only when expressly listed for this exact part number.
About Borla
Borla develops stainless-steel exhaust systems, mufflers, tips, pipes, and related components for vehicle-specific and universal performance applications. Product selection remains exact-application and exact-part-number specific.
Related Borla Products
- Borla Specialty Muffler 2.75in Center In/Out 7.75in Dia. 24in Body 29in OAL Touring Un-Notched
- Borla Specialty Muffler 3in Center In/Out 7.75in Dia. 24in Body 29in OAL Touring Un-Notched
- Borla Specialty Muffler 3in Center In/Out 7.75in Dia. 24in Body 29in OAL Touring Notched
Browse the Borla collection for related exhaust systems and components.
Frequently Asked Questions
How do I confirm this universal Borla part will fit?
Match the inlet and outlet diameter, body dimensions, flow direction, offset or center layout, available clearance, material, finish, and required fabrication to the exact Borla drawing before ordering.
Will this change require an engine tune?
A cat-back, axle-back, tip, muffler, or post-catalyst component usually does not require tuning, but confirm the exact application, emissions configuration, oxygen-sensor locations, and local requirements before installation.
What should I inspect before installation?
Check the shipping carton and components against the exact part number, then inspect clamps, hangers, gaskets, mating flanges, clearances, tip alignment, and required reused factory hardware before removing the original exhaust.
Installation Instructions
Follow the current Borla instructions and vehicle service information for this exact part number. Let the exhaust cool, support the vehicle safely, compare all parts before removal, protect sensors and wiring, use the specified clamps and torque values, align all joints and tips without preload, confirm body and suspension clearance, check for leaks, and retorque after the first heat cycles. Professional installation is recommended.
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