Borla XR-1 Sportsman Shorty Racing Muffler, 3.5-Inch Center Inlet and Outlet, Part 40004S

High quality austenitic stainless steel. Patented, race-winning XR-1 Raceline technology. 3 options: Offset - Made with the same patented, flow through design as the XR-1 Sportsman oval. The inlet/outlet are offset to the same side of the muffler, to accommodate transmission and frame rail interference on some applications Oval -- BORLAs #1 selling racing muffler. Satisfies the needs of most racing applications because it is the lightest, most compact, and highest flowing racing muffler in its class and at a competitive price. Record-holder Hurley Blakeney has run BORLAs on his AA/AT Ford T-Bird because he loves the quieter driver compartment without giving up any power.Round - Made with the same patented, flow through design as the XR-1 Sportsman Oval. This Muffler is 5 inches in diameter and 15 inches long. Designed for door car/ roadster applications that require a compact round muffler. XR-1 Sportsman Racing Muffler - 3.5" Center Inlet/ 3.5" Center Outlet 5" Round x 8" Long Body 13" Overall Length. Universal Part. Reversible Design. Million Mile Warranty

• 3.5" Center Inlet/ 3.5" Center Outlet 5" Round x 8" Long Body 13" Overall Length
• Compact size is perfect for applications with limited space
• Un-Notched necks are designed for weld in installation
• There is no logo embossment on this part
• Universal muffler. Reversible design.

The Borla XR-1 Sportsman Shorty Racing Muffler is a compact, high-flow exhaust solution for racing vehicles, door cars, roadsters, and other custom applications where installation space is limited. Built from high-quality austenitic stainless steel, this universal muffler uses Borla’s patented, race-proven XR-1 Raceline flow-through technology to help reduce exhaust restriction while maintaining a quieter driver compartment.

This Borla racing muffler features a 3.5-inch center inlet and 3.5-inch center outlet with a reversible design for flexible installation. Its compact round body is well suited to applications requiring a short muffler, while the un-notched necks support weld-in installation. The muffler has a 5-inch round body with an 8-inch body length and a 13-inch overall length. It is designed for custom fabrication and is not vehicle-specific, so fitment should be confirmed before installation.

Key Product Specifications & Technical Data

• Brand: Borla
• Part Number: 40004S
• Muffler Type: XR-1 Sportsman Shorty racing muffler
• Inlet Size: 3.5 inches
• Outlet Size: 3.5 inches
• Inlet and Outlet Location: Center inlet and center outlet
• Body Shape: Round
• Construction Material: Austenitic stainless steel
• Installation Design: Universal, reversible, weld-in compatible

What’s Included
One Borla XR-1 Sportsman Shorty Racing Muffler. Exhaust tubing, clamps, hangers, and installation hardware are not included. This product is intended for custom automotive exhaust applications; verify pipe routing, clearance, and welding requirements before installation. Covered by Borla’s Million Mile Warranty, subject to applicable warranty terms.

Features:

• Patented XR-1 Raceline Technology: Flow-through racing muffler design helps support high exhaust flow and reduced restriction.
• Austenitic Stainless Steel Construction: Durable material provides corrosion resistance for demanding automotive and motorsports environments.
• Compact Racing Profile: Short round muffler design is well suited to door cars, roadsters, and installations with limited space.
• Reversible Universal Design: Center inlet and outlet configuration allows flexible orientation for custom exhaust fabrication.

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