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XR-1®

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 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® raceline parts offer the best balance of sound and power.

  • T-304 stainless steel will never rust — our thickest material.
  • 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 strand fiberglass (CSF) for sound control.
  • Natural mill finish can be brushed or polished.
  • Reversible design for installation flexibility.
  • Recommended for high-horsepower racing applications.
XR-1®

Click on any image above to enlarge.
Vehicle(s) shown may vary from your specific model.

Note: Products are shipped un-polished unless otherwise indicated. Image shown may be a polished version. Tip style may vary.

Part# Description VehicleFits BoxDimensions1 MufflerShape Application MufflerTubingSize Model ProductType BoxWeight1 Category2 OffRoadOnly Notch MufflerConfig Catgegory3 CaseDimensions DealerHistory CategoryFilter XR1Type SystemType HasSoundData EngineSize1 EngineSize2 EngineSize3 EngineSize4 PlanningComment MufflerOverallLength HasSimulator HasValves Price  
400024 XR-1® Multi-Core 2.5" Center-Center 14"x6.25" Round - Racing Muffler part # 400024 XR-1® Multi-Core 2.5" Center-Center 14"x6.25" Round - Racing Muffler 26x12x12 Round Universal 2.5" XR-1 F 10 CATALOG N Center/Center XR1 14" x 6.25" JEGS High Performance754JEGAUTO400024https://www.jegs.com/i/Borla/157/400024/10002/-1jegs_logo.pngSummit Racing Equipment1153ATEMOTOATEMOT2400024https://www.summitracing.com/parts/bor-400024summitracing_logo.pngStreetsideAuto.com13975KEYAUTOKEYAUT2400024https://www.streetsideauto.com/p/borla-xr-1-stainless-multicore-racing-400024streetside_logo.pngParts Via15791PARTSVIA400024https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR400024/1partsvia_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 18.5" N N $276.99
40004S XR-1® Sportsman 3.5" Center-Center 8"x5" Round - Racing Muffler part # 40004S XR-1® Sportsman 3.5" Center-Center 8"x5" Round - Racing Muffler 18x5x9 Round Universal 3.5" XR-1 F 5 CATALOG N Center/Center XR1 8" x 5" JEGS High Performance122JEGAUTO40004Shttps://www.jegs.com/i/Borla/157/40004S/10002/-1jegs_logo.pngSummit Racing Equipment1140ATEMOTOATEMOT240004Shttps://www.summitracing.com/parts/bor-40004Ssummitracing_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 13" N N $196.99
400069 XR-1® Multi-Core 4" Center-Center 23"x5.5"x8.5" - Racing Muffler part # 400069 XR-1® Multi-Core 4" Center-Center 23"x5.5"x8.5" - Racing Muffler 32x9x8 Oval Universal 4" XR-1 F 12 CATALOG N N Center/Center XR1 23" x 5.5" x 8.5" Summit Racing Equipment1227ATEMOTOATEMOT2400069https://www.summitracing.com/parts/bor-400069summitracing_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 28" N N $398.99
400115 XR-1® Multi-Core Pre-Runner 3" Center-Center 34"x8.5"x5.5" - Racing Muffler part # 400115 XR-1® Multi-Core Pre-Runner 3" Center-Center 34"x8.5"x5.5" - Racing Muffler 45x11x11 Oval Universal 3" XR-1 F 34 CATALOG N Center/Center XR1 34" x 8.5" x 5.5" Mufflers Multi-Core Mufflers 0 0 0 0 0 39.25" N N $531.99
400261 XR-1® Multi-Core 3.5" Center-Center 24"x6.25" Round - Racing Muffler part # 400261 XR-1® Multi-Core 3.5" Center-Center 24"x6.25" Round - Racing Muffler 32x8x8 Round Universal 3.5" XR-1 F 15 CATALOG N Center/Center XR1 24" x 6.25 Mufflers Multi-Core Mufflers 0 0 0 0 0 29" N N $395.99
400371 XR-1® Multi-Core 3" Center-Center 16"x4.25"x7.88" - Rotary Engine Equipped Racing Muffler part # 400371 XR-1® Multi-Core 3" Center-Center 16"x4.25"x7.88" - Rotary Engine Equipped Racing Muffler 21x8x11 Oval Universal 3" XR-1 F 12 CATALOG N Center/Center XR1 16" x 4.25" x 7.88" Parts Via15795PARTSVIA400371https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR400371/1partsvia_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $315.99
400372 XR-1® Multi-Core 3" Center-Center 12"x4.25"x7.88" - Rotary Engine Equipped Racing Muffler part # 400372 XR-1® Multi-Core 3" Center-Center 12"x4.25"x7.88" - Rotary Engine Equipped Racing Muffler 6x10x19 Oval Universal 3" XR-1 F 12 CATALOG N Center/Center XR1 12" x 4.25" x 7.88" Mufflers Multi-Core Mufflers 0 0 0 0 0 17" N N $287.99
400373 XR-1® Multi-Core 3" Center-Center 16"x6.25" Round - Rotary Engine Equipped Racing Muffler part # 400373 XR-1® Multi-Core 3" Center-Center 16"x6.25" Round - Rotary Engine Equipped Racing Muffler 24x6x10 Round Universal 3" XR-1 F 12 CATALOG N Center/Center XR1 16" x 6.25" Summit Racing Equipment1361ATEMOTOATEMOT2400373https://www.summitracing.com/parts/bor-400373summitracing_logo.pngStreetsideAuto.com13996KEYAUTOKEYAUT2400373https://www.streetsideauto.com/p/borla-xr-1-stainless-multicore-racing-400373streetside_logo.pngParts Via15796PARTSVIA400373https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR400373/1partsvia_logo.pngJC Whitney12407USAPN400373https://www.jcwhitney.com/details/Borla/Muffler/B25400373.htmljcw_logo.jpg Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $315.99
400374 XR-1® Multi-Core 4" Center-Center 16"x6.25" Round - Rotary Engine Equipped Racing Muffler part # 400374 XR-1® Multi-Core 4" Center-Center 16"x6.25" Round - Rotary Engine Equipped Racing Muffler 32x8x8 Round Universal 4" XR-1 F 14 CATALOG N Center/Center XR1 16" x 6.25" Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $326.99
40085 XR-1® Sportsman 3" Center-Center 15"x5" Round - Racing Muffler part # 40085 XR-1® Sportsman 3" Center-Center 15"x5" Round - Racing Muffler 24x6x10 Round Universal 3" XR-1 F 9 CATALOG N Center/Center XR1 15" x 5" JEGS High Performance120JEGAUTO40085https://www.jegs.com/i/Borla/157/40085/10002/-1jegs_logo.pngJC Whitney12264USAPN40085https://www.jcwhitney.com/details/Borla/Muffler/B2540085.htmljcw_logo.jpgSummit Racing Equipment1022ATEMOTOATEMOT240085https://www.summitracing.com/parts/bor-40085summitracing_logo.pngParts Via15815PARTSVIA40085https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40085/1partsvia_logo.pngStreetsideAuto.com13961KEYAUTOKEYAUT240085https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40085streetside_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 Generate W/O's in increments of 56's 20" N N $156.99
40086 XR-1® Sportsman 3.5" Center-Center 15"x5" Round - Racing Muffler part # 40086 XR-1® Sportsman 3.5" Center-Center 15"x5" Round - Racing Muffler 24x6x10 Round Universal 3.5" XR-1 F 11 CATALOG N Center/Center XR1 15" x 5" Summit Racing Equipment1023ATEMOTOATEMOT240086https://www.summitracing.com/parts/bor-40086summitracing_logo.pngParts Via15819PARTSVIA40086https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40086/1partsvia_logo.pngStreetsideAuto.com13940KEYAUTOKEYAUT240086https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40086streetside_logo.pngJEGS High Performance121JEGAUTO40086https://www.jegs.com/i/Borla/157/40086/10002/-1jegs_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 20" N N $157.99
401012 XR-1® Multi-Core 3.5" Center-Center 14"x6.25" Round - Racing Muffler part # 401012 XR-1® Multi-Core 3.5" Center-Center 14"x6.25" Round - Racing Muffler 9x9x33 Round Universal 3.5" XR-1 F 12 CATALOG N N Center/Center XR1 14" x 6.25" Summit Racing Equipment1846ATEMOTOATEMOT2401012https://www.summitracing.com/parts/bor-401012summitracing_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 19" N N $299.99
40536 XR-1® Series Slim Line 3.5" Oval Pipe Center-Center 12"x3"x7.88" - Racing Muffler part # 40536 XR-1® Series Slim Line 3.5" Oval Pipe Center-Center 12"x3"x7.88" - Racing Muffler 18x5x9 Oval Universal 3.5" Oval Tube XR-1 F 9 CATALOG Center/Center XR1 12" x 3" x 7.88" Summit Racing Equipment15278ATEMOTO40536https://www.summitracing.com/oh/parts/bor-40536summitracing_logo.png Mufflers Slim Line Mufflers 0 0 0 0 N N $257.99
40575 XR-1® Multi-Core 3" Center-Center 16"x4.25"x7.88" - Racing Muffler part # 40575 XR-1® Multi-Core 3" Center-Center 16"x4.25"x7.88" - Racing Muffler 25x5x11 Oval Universal 3" XR-1 F 12 CATALOG N Center/Center XR1 16" x 4.25" x 7.88" Summit Racing Equipment921ATEMOTOATEMOT240575https://www.summitracing.com/parts/bor-40575summitracing_logo.pngJEGS High Performance143JEGAUTO40575https://www.jegs.com/i/Borla/157/40575/10002/-1jegs_logo.pngParts Via15837PARTSVIA40575https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40575/1partsvia_logo.pngJC Whitney12268USAPN40575https://www.jcwhitney.com/details/Borla/Muffler/B2540575.htmljcw_logo.jpgStreetsideAuto.com13946KEYAUTOKEYAUT240575https://www.streetsideauto.com/p/borla-xr-1-stainless-multicore-racing-40575streetside_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $315.99
40641 XR-1® Bullet 14"x3.5" Round - Racing Muffler part # 40641 XR-1® Bullet 14"x3.5" Round - Racing Muffler 18x5x9 Round Universal 2.5" XR-1 F 6 CATALOG N Center/Center XR1 14" x 3.500" Summit Racing Equipment954ATEMOTOATEMOT240641https://www.summitracing.com/parts/bor-40641summitracing_logo.pngJEGS High Performance144JEGAUTO40641https://www.jegs.com/i/Borla/157/40641/10002/-1jegs_logo.png Mufflers Bullet Mufflers 0 0 0 0 0 17" N N $222.99
40703 XR-1® Collector Muffler 2.375" Inlet 4.5" Outlet 20.5"x6.75" Round - Racing Muffler part # 40703 XR-1® Collector Muffler 2.375" Inlet 4.5" Outlet 20.5"x6.75" Round - Racing Muffler 24x10x10 Round Universal 2.375" Inlets/ 4.5" Outlet XR-1 F 12 CATALOG N Center/Center XR1 20.5" x 6.75" Mufflers Standard Collector Mufflers 0 0 0 0 0 23" N N $740.99
40722 XR-1® Multi-Core 3.5" Center-Center 16"x6.25" Round - Racing Muffler part # 40722 XR-1® Multi-Core 3.5" Center-Center 16"x6.25" Round - Racing Muffler 32x8x8 Round Universal 3.5" XR-1 F 12 CATALOG N Center/Center XR1 16" x 6.25" Summit Racing Equipment959ATEMOTOATEMOT240722https://www.summitracing.com/parts/bor-40722summitracing_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $315.99
40728 XR-1® Collector Muffler 2.25" Inlet 4" Outlet 20.5"x6.75" Round - Racing Muffler part # 40728 XR-1® Collector Muffler 2.25" Inlet 4" Outlet 20.5"x6.75" Round - Racing Muffler 25x11x11 Round Universal 2.25" Inlets/ 4" Outlet XR-1 F 12 CATALOG N Center/Center XR1 20.5" x 6.75" Mufflers Standard Collector Mufflers 0 0 0 0 0 23" N N $740.99
40741 XR-1® Multi-Core 4" Center-Center 16"x6.25" Round - Racing Muffler part # 40741 XR-1® Multi-Core 4" Center-Center 16"x6.25" Round - Racing Muffler 32x8x8 Round Universal 4" XR-1 F 12 CATALOG N Center/Center XR1 16" x 6.25" Summit Racing Equipment978ATEMOTOATEMOT240741https://www.summitracing.com/parts/bor-40741summitracing_logo.png Mufflers Multi-Core Mufflers 0 0 0 0 0 21" N N $335.99
40941 XR-1® Sportsman 2.5" Center-Center 12"x4.5"x7.88" - Racing Muffler part # 40941 XR-1® Sportsman 2.5" Center-Center 12"x4.5"x7.88" - Racing Muffler 19x6x10 Oval Universal 2.5" XR-1 F 7 CATALOG N Center/Center XR1 12" x 4.5" x 7.88" JEGS High Performance113JEGAUTO40941https://www.jegs.com/i/Borla/157/40941/10002/-1jegs_logo.pngParts Via15844PARTSVIA40941https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40941/1partsvia_logo.pngSummit Racing Equipment979ATEMOTOATEMOT240941https://www.summitracing.com/parts/bor-40941summitracing_logo.pngStreetsideAuto.com13964KEYAUTOKEYAUT240941https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40941streetside_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 17" N N $159.99
40942 XR-1® Sportsman 2.5" Center-Center 16"x4.5"x7.88" - Racing Muffler part # 40942 XR-1® Sportsman 2.5" Center-Center 16"x4.5"x7.88" - Racing Muffler 24x6x10 Oval Universal 2.5" XR-1 F 11 CATALOG N Center/Center XR1 16" x 4.5" x 7.88" Summit Racing Equipment980ATEMOTOATEMOT240942https://www.summitracing.com/parts/bor-40942summitracing_logo.pngStreetsideAuto.com13955KEYAUTOKEYAUT240942https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40942streetside_logo.pngJEGS High Performance117JEGAUTO40942https://www.jegs.com/i/Borla/157/40942/10002/-1jegs_logo.pngParts Via15845PARTSVIA40942https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40942/1partsvia_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 21" N N $173.99
40943 XR-1® Sportsman 3" Center-Center 12"x4.5"x7.88" - Racing Muffler part # 40943 XR-1® Sportsman 3" Center-Center 12"x4.5"x7.88" - Racing Muffler 19x6x10 Oval Universal 3" XR-1 F 7 CATALOG N Center/Center XR1 12" x 4.5 x 7.88" JEGS High Performance114JEGAUTO40943https://www.jegs.com/i/Borla/157/40943/10002/-1jegs_logo.pngSummit Racing Equipment981ATEMOTOATEMOT240943https://www.summitracing.com/parts/bor-40943summitracing_logo.pngParts Via15846PARTSVIA40943https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40943/1partsvia_logo.pngStreetsideAuto.com13948KEYAUTOKEYAUT240943https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40943streetside_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 17" N N $168.99
40944 XR-1® Sportsman 3" Center-Center 16"x4.5"x7.88" - Racing Muffler part # 40944 XR-1® Sportsman 3" Center-Center 16"x4.5"x7.88" - Racing Muffler 28x7x10 Oval Universal 3" XR-1 F 8 CATALOG N Center/Center XR1 16" x 4.5" x 7.88" StreetsideAuto.com13910KEYAUTOKEYAUT240944https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40944streetside_logo.pngParts Via15847PARTSVIA40944https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40944/1partsvia_logo.pngJEGS High Performance118JEGAUTO40944https://www.jegs.com/i/Borla/157/40944/10002/-1jegs_logo.pngSummit Racing Equipment982ATEMOTOATEMOT240944https://www.summitracing.com/parts/bor-40944summitracing_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 21" N N $173.99
40945 XR-1® Sportsman 3.5" Center-Center 12"x4.5"x7.88" - Racing Muffler part # 40945 XR-1® Sportsman 3.5" Center-Center 12"x4.5"x7.88" - Racing Muffler 19x6x10 Oval Universal 3.5" XR-1 F 7 CATALOG N Center/Center XR1 12" x 4.5" x 7.88" Summit Racing Equipment983ATEMOTOATEMOT240945https://www.summitracing.com/parts/bor-40945summitracing_logo.pngParts Via15848PARTSVIA40945https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40945/1partsvia_logo.pngStreetsideAuto.com13919KEYAUTOKEYAUT240945https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40945streetside_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 17" N N $200.99
40946 XR-1® Sportsman 3.5" Center-Center 16"x4.5"x7.88" - Racing Muffler part # 40946 XR-1® Sportsman 3.5" Center-Center 16"x4.5"x7.88" - Racing Muffler 24x6x10 Oval Universal 3.5" XR-1 F 7 CATALOG N Center/Center XR1 16" x 4.5" x 7.88" JEGS High Performance119JEGAUTO40946https://www.jegs.com/i/Borla/157/40946/10002/-1jegs_logo.pngSummit Racing Equipment984ATEMOTOATEMOT240946https://www.summitracing.com/parts/bor-40946summitracing_logo.pngStreetsideAuto.com13949KEYAUTOKEYAUT240946https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40946streetside_logo.pngParts Via15849PARTSVIA40946https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40946/1partsvia_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 21" N N $212.99
40947 XR-1® Sportsman 4" Center-Center 12"x4.5"x7.88" - Racing Muffler part # 40947 XR-1® Sportsman 4" Center-Center 12"x4.5"x7.88" - Racing Muffler 19x6x10 Oval Universal 4" XR-1 F 10 CATALOG N Center/Center XR1 12" x 4.5" x 7.88" StreetsideAuto.com13911KEYAUTOKEYAUT240947https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40947streetside_logo.pngParts Via15850PARTSVIA40947https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40947/1partsvia_logo.pngSummit Racing Equipment985ATEMOTOATEMOT240947https://www.summitracing.com/parts/bor-40947summitracing_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 17" N N $212.99
40948 XR-1® Sportsman 4" Center-Center 16"x4.5"x7.88" - Racing Muffler part # 40948 XR-1® Sportsman 4" Center-Center 16"x4.5"x7.88" - Racing Muffler 23x10x7 Oval Universal 4" XR-1 F 10 CATALOG N Center/Center XR1 16" x 4.25" x 7.88" Summit Racing Equipment986ATEMOTOATEMOT240948https://www.summitracing.com/parts/bor-40948summitracing_logo.pngStreetsideAuto.com13920KEYAUTOKEYAUT240948https://www.streetsideauto.com/p/borla-xr-1-stainless-sportsman-racing-40948streetside_logo.pngParts Via15851PARTSVIA40948https://borla.partsvia.com/b2c/cart/addAndCheckout/BOR40948/1partsvia_logo.png Mufflers Sportsman Mufflers 0 0 0 0 0 21" N N $239.99
40976 XR-1® Shorty Collector Muffler 2.25" Inlet 4" Outlet 14"x6.75" Round - Racing Muffler part # 40976 XR-1® Shorty Collector Muffler 2.25" Inlet 4" Outlet 14"x6.75" Round - Racing Muffler 25x11x11 Round Universal 2.25" Inlets/ 4" Outlet XR-1 F 11 CATALOG N Center/Center XR1 14" x 6.75" Mufflers Shorty Collector Mufflers 0 0 0 0 0 16.5" N N $732.99
40977 XR-1® Shorty Collector Muffler 2.375" Inlet 4.5" Outlet 14"x6.75" Round - Racing Muffler part # 40977 XR-1® Shorty Collector Muffler 2.375" Inlet 4.5" Outlet 14"x6.75" Round - Racing Muffler 25x11x11 Round Universal 2.375" Inlets/ 4.5" Outlet XR-1 F 11 CATALOG N Center/Center XR1 14" x 6.75" JEGS High Performance919JEGAUTO40977https://www.jegs.com/i/Borla/157/40977/10002/-1jegs_logo.png Mufflers Shorty Collector Mufflers 0 0 0 0 0 16.5" N N $732.99
40997 XR-1® Shorty Collector Muffler 2.125" Inlet 3.5" Outlet 14"x6.25" Round - Racing Muffler part # 40997 XR-1® Shorty Collector Muffler 2.125" Inlet 3.5" Outlet 14"x6.25" Round - Racing Muffler 24x10x9 Round Universal 2.125" Inlets/ 3.5" Outlet XR-1 F 10 CATALOG N Center/Center XR1 14" x 6.25" Mufflers Shorty Collector Mufflers 0 0 0 0 0 16.5" N N $717.99