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XR-1® Raceline

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

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Features

  • T-304 stainless steel will never rust our thickest material
  • 100% welded construction is track-tough
  • Free-flow design for improved performance
  • XR-1's race-proven design attenuates sound without restricting flow
  • Hi-temp Continuous Filament Fiber (CRF) or T-304 Stainless Steel wool (depending on app) for sound control
  • Sportsman mufflers feature hi-temp Continuous Filament Fiber (CFF) acoustic material for sound control
  • Natural mill finish can be brushed or polished prior to installation
  • Reversible design for installation flexibility
  • Recommended for high-horsepower racing applications
Help Center
XR-1® Raceline(27)
XR-1 Raceline

Part# 4ALEXR1993 What vehicle does this fit?

4ALEXR1993-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • This muffler design was run by the entire field at the 2023 Busch Light Clash at the Coliseum race
  • Designed for applications where a 5" X 6.25" oval body can be used
  • 3" Center Inlet/ 3" Center Outlet 5" x 6.25" Oval x 13.5" Long Body 18.5" Overall Length
  • Multi-Core 6 tube internal design

Price: $348.99
Select
XR-1 Raceline

Part# 40948 What vehicle does this fit?

40948-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 4" Center Inlet/ 4" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall LeReversible design
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $216.99
Select
XR-1 Raceline

Part# 40947 What vehicle does this fit?

40947-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 4" Center Inlet/ 4" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $193.99
Select
XR-1 Raceline

Part# 40946 What vehicle does this fit?

40946-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $193.99
Select
XR-1 Raceline

Part# 40945 What vehicle does this fit?

40945-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $178.99
Select
XR-1 Raceline

Part# 40944 What vehicle does this fit?

40944-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $165.99
Select
XR-1 Raceline

Part# 40943 What vehicle does this fit?

40943-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation.

Price: $153.99
Select
XR-1 Raceline

Part# 40942 What vehicle does this fit?

40942-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 2.5" Center Inlet/ 2.5" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $164.99
Select
XR-1 Raceline

Part# 40941 What vehicle does this fit?

40941-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 2.5" Center Inlet/ 2.5" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $149.99
Select
XR-1 Raceline

Part# 40741 What vehicle does this fit?

40741-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles
  • 4" Center Inlet/ 4" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length
  • Multi-Core 6 tube internal design. High tempertaure T-304 stainless steel wool for sound control.

Price: $409.99
Select
XR-1 Raceline

Part# 40722 What vehicle does this fit?

40722-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles
  • 3.5" Center Inlet/ 3.5" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length
  • Multi-Core 6 tube internal design. High temperature T-304 stainless steel wool for sound control

Price: $348.99
Select
XR-1 Raceline

Part# 40641 What vehicle does this fit?

40641-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Bullet style muffler with neck on inlet end only
  • Use on compact applications where no tail pipe or turn down is needed, or weld on your own
  • 2.5" Center Inlet/ 2.5" Center Outlet (no neck) 3.5" Round x 14" Long Body 16.75" Overall Length
  • Multi-Core 3 tube internal design. High temperature T-304 SS wool for sound control.

Price: $228.99
Select
XR-1 Raceline

Part# 40575 What vehicle does this fit?

40575-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Compact design is perfect for applications with limited space
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles.
  • 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval 16" Body 21" Overall Length
  • Multi-Core 3 tube internal design. High temperature T-304 stainless steel wool for sound control

Price: $309.99
Select
XR-1 Raceline

Part# 40536 What vehicle does this fit?

40536-main-1-thumb.jpg
Pipe Diameter:3.5" Tube Formed Into 4.13" x 2.61" Oval
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossment.
  • Slim Line mufflers are perfect for low profile applications with limited space
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles
  • 4.13" x 2.61" Oval Center Inlet / Outlet Necks. 12" Long x 3" High x 7.88" Wide Oval Body 17" OAL
  • Multi-Core 2 tube internal design. High temperature T-304 stainless steel wool for sound control.

Price: $553.99
Select
XR-1 Raceline

Part# 401392 What vehicle does this fit?

401392-main-1-thumb.jpg
Pipe Diameter:2.5"
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 2.5" Center Inlet/ 2.5" Center Outlet 5" Round x 15" Long Body, 20" Overall Length.
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $148.99
Select
XR-1 Raceline

Part# 401012 What vehicle does this fit?

401012-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Designed for applications where a 6.25" round muffler body can be used
  • Will work on a wide range of vehicles
  • 3.5" Center Inlet/ 3.5" Center Outlet 6.25" Round x 14" Long Body 19.75" Overall Length
  • Multi-Core 4 tube internal design

Price: $319.99
Select
XR-1 Raceline

Part# 40086 What vehicle does this fit?

40086-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3.5" Center Inlet/ 3.5" Center Outlet 5" Round x 15" Long Body 20" Overall Length
  • Compact size is perfect for weld in installation
  • Un-Notched necks are designed for weld in installation

Price: $167.99
Select
XR-1 Raceline

Part# 40085 What vehicle does this fit?

40085-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3" Center Inlet/ 3" Center Outlet 5" Round x 15" Long Body 20" Overall Length
  • Compact size is perfect for applications with limited space
  • Un-Notched necks are designed for weld in installation

Price: $146.99
Select
XR-1 Raceline

Part# 400374 What vehicle does this fit?

400374-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles
  • 4" Center Inlet/ 4" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length
  • Multi-Core 4 tube internal design

Price: $390.99
Select
XR-1 Raceline

Part# 400373 What vehicle does this fit?

400373-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles
  • 3" Center Inlet/ 3" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length
  • Multicore 4 tube internal design

Price: $299.99
Select
XR-1 Raceline

Part# 400372 What vehicle does this fit?

400372-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Compact design is perfect for applications with limited space
  • Can be used on a wide range of vehicles
  • 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length
  • Multi-Core 4 tube internal design

Price: $267.99
Select
XR-1 Raceline

Part# 400371 What vehicle does this fit?

400371-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Compact design is perfect for applications with limited space
  • Can be used on a wide range of vehicles
  • 3" Center Inlet/ 3" Center Outlet 4.25" x 7.88" Oval x 16" Long Body 21" Overall Length
  • Multi-Core 4 tube internal design

Price: $298.99
Select
XR-1 Raceline

Part# 400261 What vehicle does this fit?

400261-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles
  • 3.5" Center Inlet/ 3.5" Center Outlet 6.25" Round x 24" Long Body 29" Overall Length
  • Multi-Core 6 tube internal design. High temperature T-304 stainles steel wool for sound control.

Price: $437.99
Select
XR-1 Raceline

Part# 400115 What vehicle does this fit?

400115-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design. No BORLA® logo embossement.
  • Long body design works well on SUV & truck applications
  • Designed for Pre-Runner vehicles, but can be used on other applications including rotary engines
  • 3" Center Inlet/ 3" Center Outlet 5.5" x 8.5" Oval x 34" Long Body 39.25" Overall Length
  • Multi-Core 4 tube internal design. High temperature T-304 stainless steel wool for sound control

Price: $553.99
Select
XR-1 Raceline

Part# 400069 What vehicle does this fit?

400069-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles including rotary engine equipped vehicles
  • 4" Center Inlet/ 4" Center Outlet 5.5" x 8.5" Oval x 23" Long Body 28" Overall Length
  • Multi-Core 6 tube internal design. High temperature SS wool for sound control.

Price: $399.99
Select
XR-1 Raceline

Part# 40004S What vehicle does this fit?

40004S-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • 3.5" Center Inlet/ 3.5" Center Outlet 5" Round x 8" Long Body 13" Overall Length
  • Compact size is perfect for applications with limited space
  • There is no logo embossment on this part
  • Un-Notched necks are designed for weld in installation

Price: $178.99
Select
XR-1 Raceline

Part# 400024 What vehicle does this fit?

400024-main-1-thumb.jpg
Has Valves FALSE

  • Universal muffler. Reversible design.
  • Long body design works well on SUV & truck applications
  • Can be used on a wide range of vehicles
  • 2.5" Center Inlet/ 2.5" Center Outlet 6.25" Round x 14" Long Body 18.5" Overall Length
  • Multi-Core 6 tube internal design.

Price: $294.99
Select
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XR-1 Raceline
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