The Borla XR-1 Low Profile Multi-Core racing muffler has a compact 4in diameter body that suits applications with limited space and works across a wide range of vehicles. Sometimes called a hot rod muffler, it uses Borla's patented Multi-Core three-tube design, which flows better than straight tubing for maximum flow, horsepower, and torque, making it well suited to high-horsepower builds. It is built from T-304 stainless steel for corrosion resistance, with 100% welded construction and high-temperature continuous-filament fiber acoustic material for sound control. The reversible design adds installation flexibility, and the natural mill finish can be brushed or polished before installation. It is made in the USA.
Specifications:
- Type: XR-1 Multi-Core racing muffler, universal
- Design: Multi-Core three-tube
- Inlet/Outlet: 2.5in center inlet / 2.5in center outlet
- Body: 4in round x 16in long body
- Overall length: 21in
- Material: T-304 stainless steel
- Construction: 100% welded, reversible, CFF acoustic material
- Finish: Natural mill, can be brushed or polished
- Made in the USA
- Part number: 401382
FAQ
Is the Borla 401382 a universal muffler?
Yes. Its compact 4in diameter body works on a wide range of classic and late-model vehicles, and the reversible design allows flexible installation.
What is the Multi-Core design?
The XR-1 Multi-Core uses a patented three-tube internal core that flows better than straight tubing, which supports strong flow, horsepower, and torque.
Is it suited to high-horsepower applications?
Yes. The Multi-Core racing design is recommended for high-horsepower builds where both flow and sound control matter.
Is this muffler street legal?
It is a universal racing muffler sold as a component. Emissions legality depends on the complete exhaust system and the application, so buyers should confirm the requirements for their specific vehicle and local regulations.
Where is it made?
It is made in the USA.
