Borla 2.25n Inlet/Outlet Center/Offset Oval ProXS Muffler

This universal Borla performance muffler is selected by exact manufacturer part number 40658. Confirm every inlet, outlet, body, offset, clearance, finish, and fabrication requirement against the Borla drawing before ordering.

Key Features

• Compact Oval Shape: 4.25″ height x 7.88″ width x 14″ body length (19″ overall) slides into restricted areas without compromising flow or sound.
• T-304 Stainless Steel: Corrosion-resistant material ensures lifelong durability in harsh conditions.
• Free-Flow with CFF Acoustic Core: High-flow passages paired with continuous-filament fiber material refine sound while increasing horsepower and throttle response.
• Reversible Design: Mount with 2.25″ center inlet/offset outlet or flip for offset inlet/center outlet to match any exhaust layout.
• Leaders in stainless steel exhaust since pioneering systems for classics like Rolls-Royce and Ferrari.
• Precision manufacturing with T-304 steel and advanced acoustic technology for reliable performance.

Fitment

Specifications

What’s Included

One new Borla product identified by manufacturer part number 40658. 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 2.5in Inlet/Outlet Center/Offset Oval ProXS Muffler
• Borla Universal 2.25in Inlet/Outlet Oval Center/Offset 14in x 4in x 9.5in ProXS Muffler
• Borla 3in Inlet/Dual 2.25in Outlet Center/Dual Oval ProXS Muffler

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.