Featuring a patented uninterrupted-flow internal design and our Multicore technology, our XR-1® mufflers outflow a straight piece of pipe in repeated testing. For racing applications only!
Four important reasons racers win with Borla
You fear what you can't hear. Especially in any kind of breakout drag racing where you can "sneak up" on an opponent
Improved driver awareness. Drivers in all forms of racing can better tell what their cars are doing
No loss in performance. Fact is, in some cases Borla's patented XR-1® mufflers actually improved horsepower over a straight piece of pipe
Reduced driver fatigue. Very important in many forms of competition
Oval 16" X 4.25" X 7.88" Inlet (I.D.): 4" Outlet (O.D.): 4"
XR-1® Sportsman Racing Muffler 4" Center Inlet/ 4" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Oval 12" X 4.25" X 7.88" Inlet (I.D.): 4" Outlet (O.D.): 4"
XR-1® Sportsman Racing Muffler 4" Center Inlet/ 4" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Oval 16" X 4.25" X 7.88" Inlet (I.D.): 3.5" Outlet (O.D.): 3.5"
XR-1® Sportsman Racing Muffler 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Oval 12" X 4.25" X 7.88" Inlet (I.D.): 3.5" Outlet (O.D.): 3.5"
XR-1® Sportsman Racing Muffler 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88 Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Oval 16" X 4.25" X 7.88" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Sportsman Racing Muffler 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Oval 12" X 4.25" X 7.88" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Sportsman Racing Muffler - 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Oval 16" X 4.25" X 7.88" Inlet (I.D.): 2.5" Outlet (O.D.): 2.5"
XR-1® Sportsman Racing Muffler. 2.5" Center Inlet/ 2.5" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Oval 12" X 4.25" X 7.88" Inlet (I.D.): 2.5" Outlet (O.D.): 2.5"
XR-1® Sportsman Racing Muffler. 2.5" Center Inlet/ 2.5" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Oval 13.5" X 5 X 6.25" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Multi-Core Racing Muffler (6 Core) - 3" Center Inlet/ 3" Center Outlet 5" x 6.25" Oval x 13.5" Long Body 18.5" Overall Length. Universal Part. Reversible Design.
Round 16" X 6.25" Inlet (I.D.): 3.5" Outlet (O.D.): 3.5"
XR-1® Multi-Core Racing Muffler 3.5" Center Inlet/ 3.5" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Round 14" X 3.5" Inlet (I.D.): 2.5" Outlet (O.D.): 2.5"
XR-1® Multicore Bullet Racing Muffler 2.5" Center Inlet/ 2.5" Center Outlet (no neck) 3.5" Round x 14" Long Body 16.75" Overall Length. Universal Part.
Oval 12" X 3" X 7.88" Inlet (I.D.): 3.5" Oval Tube Outlet (O.D.): 3.5" Oval Tube
Pipe Diameter: 3.5" Tube Formed Into 4.13" x 2.61" Oval
XR-1® Multi-Core Slim Line Racing Muffler. Center Inlet / Center Outlet Necks Are 3.5" Tubing Formed Into A 4.13" x 2.61" Oval. 3" High x 7.88 Wide Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Round 14" X 6.25" Inlet (I.D.): 3.5" Outlet (O.D.): 3.5"
XR-1® Multi-Core Racing Muffler 3.5" Center Inlet/ 3.5" Center Outlet 6.25" Round x 14" Long Body 19.75" Overall Length. Universal Part. Reversible Design.
Oval 12" X 4.25" X 7.88" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Multi-Core Racing Muffler 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design.
Oval 16" X 4.25" X 7.88" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Multi-Core Racing Muffler 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length. Universal Part. Reversible Design.
Oval 34" X 8.5" X 5.5" Inlet (I.D.): 3" Outlet (O.D.): 3"
XR-1® Multi-Core Racing Muffler 3" Center Inlet/ 3" Center Outlet 5.5" x 8.5" Oval x 34" Long Body 39.25" Overall Length. Universal Part. Reversible Design.
Oval 23" X 5.5" X 8.5" Inlet (I.D.): 4" Outlet (O.D.): 4"
XR-1® Multi-Core Racing Muffler 4" Center Inlet/ 4" Center Outlet 5.5" x 8.5" Oval x 23" Long Body 28" Overall Length. Universal Part. Reversible Design.
Round 14" X 6.25" Inlet (I.D.): 2.5" Outlet (O.D.): 2.5"
XR-1® Multi-Core Racing Muffler - 2.5" Center Inlet/ 2.5" Center Outlet 6.25" Round x 14" Long Body 18.5" Overall Length. Universal Part. Reversible Design.
