The Borla XR-1 Sportsman Shorty is an ultra-compact racing muffler with a 3.5in center inlet and 3.5in center outlet on a 5in round body (8in body, 13in overall). XR-1 Raceline flow-through technology balances sound and power in the smallest possible package for tight installs. Un-notched necks for weld-in installation; T-304 stainless with a reversible design and no logo embossment.
| Type | XR-1 Sportsman Shorty racing muffler |
| Inlet/Outlet | 3.5in inlet / 3.5in outlet |
| Configuration | Center / Center - un-notched (weld-in) |
| Body | Round - 5in diameter - 8in body - 13in overall |
| Material | T-304 stainless steel - reversible - no embossment |
| Part Number | 40004S |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — 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.
