Borla Performance XR-1 Multicore Round Racing Muffler - 2.5-Inch Universal Fabricator Component (401383)
Unleash absolute flow velocity and dominant sound control on the track with the Borla Performance XR-1 Multicore Round Racing Muffler. Engineered as the ultimate solution for high-horsepower race cars, street machines, and tight custom chassis fabrications, this universal component is often referred to as the definitive hot rod muffler. It features Borla's patented high-tech Multi-Core 3-tube internal design, which is scientifically proven to out-flow a standard piece of straight exhaust tubing. By completely balancing pressure waves and expanding flow volume, this ultra-efficient racing muffler maximizes top-end horsepower, increases mid-range torque, and delivers a crisp, powerful performance exhaust note.
Built to handle intense track abuse, extreme anti-lag thermal shock, and high-temperature exhaust blast, this compact muffler is manufactured from premium T-304 austenitic stainless steel to provide lifelong defense against splitting and structural rust. The outer shell features a 100% fully welded construction for maximum strength, while the inner cores are packed with high-temperature continuous-filament fiber (CRF) acoustic material to regulate high-decibel track sound without restricting flow. Measuring 14 inches in body length and 19 inches overall, the slim 4-inch round case is highly versatile and features a fully reversible design with a 2.5-inch center inlet and center outlet. This racing component is proudly made in the USA.
Features
- Patented XR-1 Multi-Core 3-tube internal design delivers a flow rate that exceeds straight tubing
- Optimizes high-RPM exhaust gas velocity to maximize broad-range horsepower and torque
- Compact 4" round case profile provides excellent ground clearance for space-limited race chassis
- Manufactured from top-tier T-304 austenitic stainless steel for life-long structural durability
- Packed with continuous-filament fiber (CRF) acoustic material for clear, crisp sound management
- Features a fully reversible design for maximum installation and fabrication flexibility
- Proudly manufactured in the USA by the industry's most trusted performance exhaust brand
Specifications & Dimensions
- Inlet Diameter / Configuration: 2.5" - Center Position
- Outlet Diameter / Configuration: 2.5" - Center Position
- Muffler Design: Patented Multi-Core (Reversible Flow Pathway)
- Muffler Case Shape: 4" Round Profile
- Muffler Case Length: 14"
- Overall Component Length: 19"
- Outer Shell Finish: Natural Mill Finish (Can be brushed or polished prior to welding)
*Note: This is a Universal fabrication component intended for custom racing and high-performance exhaust building. It is not a direct vehicle-specific bolt-on. Installation hardware, mounting brackets, and clamps are NOT included. Professional welding and custom fabrication are highly recommended.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
