Borla · New
Borla 3in ID In/Out x 34in x 8.5 in x 5.5in Oval XR-1 Multi-core Racing Muffler
MPN 400115 · Store SKU bor400115
Supplier stock checked 11/8/2026, 7:27:17 AM UTC. Adding a part does not reserve it.
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Product details
XR-1(r) Multi-Core Racing Muffler. 3" Center Inlet/ 3" Center Outlet 5.5" x 8.5" Oval x 34" Long Body 39.25" Overall Length. Designed for Pre-Runner trucks. Long body design works well on SUVs & trucks but can be used on a wide range of other vehicles including rotary engine equipped vehicles. Body has reinforcing ribs. It features BORLA(r)'S patented Multi-Core 4 tube design for maximum flow, horsepower, and torque. The Multi-Core portion of XR-1(r) mufflers flows better than straight tubing. Recommend for high horsepower applications. Reversible design for installation flexibility. T-304 Stainless steel for superior corrosion resistance. Natural mill finish can be brushed or polished prior to installation. 100% welded construction for strength. High temperature T-304 stainless steel wool packing for sound control. There is no BORLA(r) logo embossment on this part. Best of all, it's made in the USA. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand. BORLA XR-1 Raceline products are the choice of todays hottest drag and oval track racers. Featuring a patented uninerrupted-flow design and multicore technology. BORLAs XR-1 mufflers actually outflow a straight piece of pipe in repeated testing. XR-1 race products are light weight and constructed of high quality austenitic stainless steel for track-tough durability. They meet the strictest noice requirements and use sound absorbing stainless steel pcking to protect against burnout. Hands down, BORLAs XR-1 Raceline offers the best balance of sound and power. XR-1 Multi-Core Racing Muffler Pre-Runner Vehicles - 3" Center Inlet/ 3' Center Outlet 5.5" x 8.5" Oval x 34" Long Body 39.25" Overall Length. Universal Part. Reversible Design. XR-1® Stainless Multicore Racing Mufflers XR-1 Multicore Muffler
Manufacturer fitment & guides
Check 400115 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y