Borla XR-1 Sportsman Racing Mufflers

Borla's XR-1 race line products are the choice of today's hottest racers. Featuring a patented uninterrupted-flow design and multi-core technology, Borla's XR-1 mufflers actually outflow a straight piece of pipe. XR-1 race products are made in the USA and constructed of high-quality T-304 stainless steel for track tough durability. They meet the strictest noise requirements. Multi-Core, Collector, and Bullet Racing mufflers feature steel wool packing for sound control. Sportsman mufflers feature high temperature continuous filament fiber (CFF) for sound control. Hands down, Borla’s XR-1 race line parts offer the best balance of sound and power.

Note: Un-Notched necks are designed for weld in installation. If clamping, use 3" wide band clamp #18004.

Sound Level Shape Material Inlet Dia.
Aggressive Oval Stainless 2.5"
Outlet Dia. Inlet/Outlet Config. Case Size Overall Len.
2.5" Center/Center 12" x 4.25" x 7.88" 17"
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  • T-304 stainless steel will never rust
  • Free-flow design for improved performance
  • 100% welded construction is track-tough
  • Multicore, Collector, and Bullet Racing muffler feature steel wool packing for sound control
  • XR-1's race-proven design attenuates sound without restricting flow
  • Sportsman mufflers feature high temperature continuous filament fiber (CFF) for sound control
  • Reversible design for installation flexibility
  • Recommended for high-horsepower racing applications