Borla Pro-XS universal performance muffler with a 2.5 inch center inlet and center outlet. Built from T-304 austenitic stainless steel with fully welded construction and a straight-through, free-flow design using high-temperature continuous-filament fiber (CFF) packing for sound control. The reversible body installs in either orientation and carries a natural mill finish that can be brushed or polished. Made in the USA and backed by Borla's Million-Mile Warranty.
Specifications
| Type | Pro-XS straight-through performance muffler |
| Inlet/Outlet | 2.5in center / center |
| Material | T-304 stainless steel |
| Packing | Continuous-filament fiber (CFF) |
| Part Number | 40364 |
| Warranty | Million-Mile Warranty |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
