Sorry this product is no longer available and has been discontinued.
The information listed below is for reference.
BORLA's XR-1® raceline products are the choice of today's hottest racers. Featuring a patented uninterrupted-flow design, 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 using high temperature continuous filament fiber (CFF) for sound control. Hands down, BORLA's XR-1® raceline parts offer the best balance of sound and power.