The Borla XR-1 Multi-Core is a compact racing muffler with a 3in center inlet and 3in center outlet on a 4.25in x 7.88in oval body (12in body, 17in overall). Its patented Multi-Core 4-tube design flows better than straight tubing for maximum horsepower and torque, making it ideal for high-horsepower builds and tight chassis packaging. T-304 stainless with CFF acoustic packing and a reversible design; no Borla logo embossment on this part.
Specifications
| Type | XR-1 Multi-Core racing muffler |
| Inlet/Outlet | 3in inlet / 3in outlet |
| Configuration | Center / Center |
| Body | Oval - 4.25in x 7.88in - 12in body - 17in overall |
| Core | Patented Multi-Core 4-tube |
| Material | T-304 stainless steel - 100% welded - natural mill finish |
| Design | Reversible - no Borla logo embossment |
| Fitment | Universal - high-horsepower / rotary applications |
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