Borla XR1 Multicore Muffler (401012) 1701 produces dyno-proven improvements of 5

produces dyno-proven improvements of 5

You can be confident yourSTILLEN performance exhaust system will withstand harsh weather and road conditions for years to come

High heat deflection material

This system will totally wake up the V12

No need to replace a burst panel after a backfire as the springs will automatically reset after each backfire

Borla XR1 Multicore Muffler (401012) 1701 produces dyno-proven improvements of 5Borla XR 1 Multi Core 3. 5" Center Center 14" x 6. 25" Round Racing Muffler For Venues Requiring A Muffler (401012) BORLA's XR 1 raceline 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