Borla XR-1 Raceline Multi-Core Racing Muffler 4" Center Inlet / 4" Center Outlet (40741)
Unleash uncompromised track performance and maximize horsepower with the Borla XR-1 Raceline Multi-Core Racing Muffler. Specifically engineered for extreme high-horsepower racing applications, heavy-duty diesel or gas trucks, full-size SUVs, and high-flow forced induction street/strip builds utilizing massive 4-inch piping, this large-body round muffler features Borla's patented multi-core six-tube internal design. This innovative technology is fluid-dynamically proven to flow even better than a standard length of straight exhaust tubing. By completely eliminating restrictive backpressure, it drastically improves exhaust gas velocity to optimize horsepower and torque delivery, making it an exceptional choice for everything from high-displacement race engines to punishing rotary track configurations.
Built to endure the intense heat and harsh environments of competitive motorsport and heavy towing, this heavy-duty race muffler features a 100% welded chassis manufactured from premium T-304 stainless steel for lifetime protection against rust and corrosion. The substantial 16-inch long body design provides excellent case volume to control severe sound frequencies. Sound attenuation is managed by premium, high-temperature T-304 stainless steel wool 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 in a classic natural mill finish that can be brushed or polished to a mirror shine prior to a custom weld-in fabrication.
Features
- Patented multi-core six-tube racing layout flows better than standard straight tubing
- Extended 16" long body design provides excellent volume control for trucks, SUVs, and high-horsepower builds
- Manufactured from 100% welded, premium T-304 stainless steel for lifetime durability
- Packed with heavy-duty T-304 stainless steel wool to survive extreme racing exhaust 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 and street vehicles
Fitment
- Universal Fitment
- High-Horsepower Race, Street/Strip, Truck, and SUV Performance Vehicles
- Universal 4" Weld-In Round Track Applications
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