Outlet diameter (OD): 4"
Primary tube (OD): 2.25"
Uses sound-absorbing stainless steel packing to protect against burnout
Million mile warranty
Borla XR-1 Raceline products are the choice of today’s hottest drag and oval track racers. Featuring a patented
uninterrupted-flow design and multi-core technology, Borla’s XR-1 mufflers actually outflow a straight piece of pipe in
repeated testing. XR-1 race products are lightweight and constructed of high quality austenitic stainless steel for
track-tough durability. They meet the strictest noise requirements and use sound-absorbing stainless steel packing to
protect against burnout. Hands down, Borla’s XR-1 Raceline offers the best balance of sound and power. This muffler has
an outlet diameter of 4 inches and a primary tube of 2.25 inches.