The Borla XR-1 Multi-Core is a compact hot-rod racing muffler with a 2.5in center inlet and 2.5in center outlet on a 4in round body (16in body, 21in overall). Its patented Multi-Core 3-tube design flows better than straight tubing for maximum horsepower and torque, while the slim 4in body suits tight chassis packaging. T-304 stainless with CFF acoustic packing and a reversible design.
Specifications
| Type | XR-1 Multi-Core racing muffler |
| Inlet/Outlet | 2.5in inlet / 2.5in outlet |
| Configuration | Center / Center |
| Body | Round - 4in diameter - 16in body - 21in overall |
| Core | Patented Multi-Core 3-tube |
| Material | T-304 stainless steel - 100% welded - natural mill finish |
| Fitment | Universal - high-horsepower applications |
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