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.
| 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 |
| Part Number | 401382 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
