Borla XR-1 Raceline Sportsman Muffler 4" Center Inlet / 4" Center Outlet (40948)
Unleash uncompromised track performance and maximize horsepower with the Borla XR-1 Raceline Sportsman Muffler. Specifically engineered for extreme high-horsepower racing applications, heavy-duty diesel or gas trucks, and demanding engine setups, this full-length oval racing muffler features an extended 16-inch body for enhanced sound attenuation. By completely eliminating restrictive backpressure, its massive 4-inch straight-through performance internal architecture drastically improves exhaust gas velocity to maximize horsepower and torque delivery. The Sportsman series is widely recognized for offering the ultimate competitive balance of high-volume gas flow and raw power delivery on the track.
Built to endure the intense heat and harsh environments of competitive motorsport, this heavy-duty race muffler features a 100% welded chassis manufactured from premium T-304 austenitic stainless steel for superior protection against rust and corrosion. While providing excellent case volume to control harsh drone, it maintains a sleek underbody packaging profile. Sound attenuation is managed by premium, high-temperature continuous-filament fiber (CFF) acoustic packing material, which dampens high-frequency harshness while preserving an aggressive, wide-open racing roar under acceleration. Delivering ultimate installation flexibility with a fully reversible inline layout and smooth, un-notched necks, this American-made unit arrives ready for a clean weld-in custom fabrication.
Features
- Straight-through free-flow design reduces backpressure to unlock horsepower and torque
- Extended 16" long body provides enhanced sound attenuation for a deeper racing sound signature
- Sportsman racing architecture delivers an optimal balance of structural flow and sound power
- Manufactured from 100% welded, premium T-304 austenitic stainless steel for maximum durability
- Packed with heavy-duty continuous-filament fiber (CFF) to survive extreme racing temperatures
- Smooth, un-notched necks optimized for direct weld-in custom exhaust fabrication
- Fully reversible, universal design features a straight-line 4" center inlet and 4" center outlet
- Proudly made in the USA to deliver elite performance on a wide range of track vehicles
Fitment
- Universal Fitment
- High-Horsepower Race, Street/Strip, Truck, and Custom Performance Vehicles
- Universal 4" Weld-In Center-Inlet/Center-Outlet Track Applications
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