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Exhaust› Mufflers and Resonators

Borla

Borla XR-1 Multicore 2.5in Inlet 4in Outlet RDX 14in

$299.99 $267.99 Save $32.00

SKU: B00F 401383

In Stock
In Stock
Ships by Aug 6
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 401383

XR-1 (R) Multi-Core Racing Muffler. 2.5" Center Inlet/ 2.5" Center Outlet 4" Round x 14" Long Body 19" Overall Length. Compact 4" diameter muffler body is perfect for applications with limited space and can be used on a wide range of vehicles. This muffler is sometimes referred to as a 'Hot Rod' muffler. It features BORLA (R)'S patented Multi-Core 3 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 will never rust. Natural mill finish can be brushed or polished prior to installation. 100% welded construction for strength. High-temperature continuous-filament fiber (CRF) acoustic material for sound control. 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 Muffler Racing Muffler - 2.5" Center Inlet/ 2.5" Center Outlet 4" Round x 14" Long Body 19" Overall Length. Universal Part. Reversible Design.

MIA's Description

The Borla XR-1 Multicore Muffler is a high-performance exhaust component engineered for automotive enthusiasts seeking an aggressive sound combined with reliable durability. Featuring a compact design with a 2.5-inch inlet and a 4-inch round outlet, this muffler is suitable for a wide range of vehicles, from classic cars to modern models. Its multicore construction enhances sound quality and flow efficiency, while the reversible design offers versatile installation options. Crafted with high-quality materials, the XR-1 muffler delivers improved exhaust tone and durability, making it an ideal upgrade for performance-oriented applications. Its robust build ensures long-lasting performance under demanding driving conditions.

Fitment

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Specifications

BrandBorla
Part NumberB00F 401383

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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