Borla XR-1 Multi-Core Racing Muffler 400115, 3-Inch Center Inlet and Outlet

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. 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. Million Mile Warranty

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

The Borla XR-1 Multi-Core Racing Muffler is engineered for pre-runner trucks and high-horsepower exhaust systems that demand strong flow, durable construction, and flexible installation. Part number 400115 features a 3-inch center inlet and 3-inch center outlet in a universal, reversible design that can be adapted to a wide range of vehicles. Its long-body configuration is well suited for SUVs and trucks and may also be used with rotary engine applications when properly installed.

At the core of this racing muffler is Borla’s patented Multi-Core four-tube design, which is engineered to support high exhaust flow while helping maximize horsepower and torque potential. Reinforcing ribs add strength to the oval muffler body, while 100% welded construction provides reliable durability for demanding driving conditions. High-temperature T-304 stainless steel wool packing helps control sound and withstand exhaust system heat.

The Borla XR-1 is manufactured from T-304 stainless steel for excellent corrosion resistance. Its natural mill finish can be brushed or polished before installation to suit the vehicle’s exhaust system. The reversible layout provides added flexibility when positioning the muffler during fabrication. This is a universal component, so inlet and outlet alignment, piping, hangers, and vehicle-specific fitment should be verified before installation. The part does not include a Borla logo embossment and is made in the USA. It is backed by Borla’s Million Mile Warranty.

Key Product Specifications and Technical Data

• Brand: Borla
• Part Number: 400115
• Product Type: XR-1 Multi-Core racing muffler
• Inlet Configuration: 3-inch center inlet
• Outlet Configuration: 3-inch center outlet
• Body Shape: Oval
• Body Length: 34 inches; overall length is 39.25 inches
• Material: T-304 stainless steel with high-temperature stainless steel wool packing

What’s Included

• One Borla XR-1 Multi-Core racing muffler

Features:

• Multi-Core Flow Design: Borla’s patented four-tube internal design is engineered for high exhaust flow and strong horsepower and torque potential.
• High-Temperature Sound Control: T-304 stainless steel wool packing helps manage exhaust sound while resisting elevated exhaust temperatures.
• Durable Stainless Steel Construction: T-304 stainless steel, reinforcing ribs, and 100% welded construction provide long-lasting strength and corrosion resistance.
• Universal Reversible Installation: The center-inlet and center-outlet layout can be reversed for installation flexibility on pre-runner trucks, SUVs, trucks, and other compatible applications.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1