Borla ProXS Universal Muffler 2-Inch Offset Inlet and Center Outlet, Part 40657

ProXS Muffler 2" Offset Inlet/ 2" Center Outlet, 4.25" x 7.88" Oval, 14" Long Body, 19" Overall Length. Un-Notched necks are designed for weld in installation. If clamping, use 3" wide band clamps (clamps not included). Compact size is perfect for applications with limited space. Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel for superior corrosion resistance. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Best of all, it's made in the USA and backed by BORLA(r)'s Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. ProXS Muffler 2" Offset Inlet/ 2" Center Outlet, 4.25" x 7.88" Oval, 14" Long Body, 19" Overall Length. Universal Part. Reversible Design. Million Mile Warranty

• Un-Notched necks are designed for weld in installation. If clamping, use 3" wide band clamps.
• 2.25" Offset Inlet/ 2.25" Center Outlet, 4" x 9.5" Oval, 14" Long Body, 19" Overall Length
• Alternate muffler with notched necks is 400477. Use 1" wide band clamps 18302.
• Universal muffler. Reversible design.

The Borla ProXS universal performance muffler is designed for custom exhaust systems that require efficient sound control, durable construction, and flexible installation. This reversible muffler features a 2-inch offset inlet and 2-inch center outlet, making it suitable for a wide range of automotive exhaust applications. Its compact oval body is ideal for installations where available space is limited, while the un-notched necks support weld-in installation.

Constructed from high-quality T-304 austenitic stainless steel, the Borla ProXS muffler provides excellent corrosion resistance and long-term durability. Its fully welded construction adds strength, and the free-flow design supports improved exhaust performance. High-temperature continuous-filament fiber acoustic material helps manage sound without compromising the muffler’s efficient internal flow. The natural mill finish may be brushed or polished before installation for a customized appearance.

For clamp-style installation, use 3-inch-wide band clamps; clamps are not included. The reversible design provides additional positioning flexibility during fabrication. This universal muffler is made in the USA and backed by Borla’s Million-Mile Warranty. An alternate version with notched necks is available as Borla part 400477 and is designed for use with 1-inch-wide band clamps, such as Borla part 18302. Verify exhaust routing and outlet alignment before installation.

Key Product Specifications and Technical Data

• Brand: Borla
• Series: ProXS
• Part Number: 40657
• Inlet Configuration: 2-inch offset inlet
• Outlet Configuration: 2-inch center outlet
• Body Shape: Oval
• Construction Material: T-304 austenitic stainless steel
• Installation Type: Universal, reversible, weld-in or band-clamp compatible

What's Included

• One Borla ProXS universal performance muffler

Features:

• Compact Performance Design: The space-saving oval muffler is well suited to custom exhaust systems with limited installation room.
• Reversible Configuration: The muffler can be positioned in either direction to simplify exhaust routing and installation.
• Durable Stainless Steel Construction: T-304 austenitic stainless steel provides excellent corrosion resistance and long-lasting durability.
• Free-Flow Acoustic Performance: Fully welded construction and high-temperature continuous-filament fiber acoustic material support efficient exhaust flow and controlled sound.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1