The Borla XR-1 Multi-Core is a racing muffler with a 2.5in center inlet and 2.5in center outlet on a 6.25in round body (14in body, 18.5in overall). Its patented Multi-Core 6-tube design flows better than straight tubing for maximum horsepower and torque, suiting SUV, truck, rotary and other high-horsepower builds. T-304 stainless with a reversible design.
| Type | XR-1 Multi-Core racing muffler |
| Inlet/Outlet | 2.5in inlet / 2.5in outlet |
| Configuration | Center / Center |
| Body | Round - 6.25in diameter - 14in body - 18.5in overall |
| Core | Patented Multi-Core 6-tube |
| Material | T-304 stainless steel - reversible |
| Part Number | 400024 |
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.
