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Borla

Borla

Borla XR-1 Multi-Core 3in Ctr-Ctr Round 16in x 6.25in Rotary Engine Equipped Racing Muffler

SKU: BOR400373

Mufflers

BOR XR-1 Mufflers...

Borla XR-1 Multi-Core 3in Ctr-Ctr Round 16in x 6.25in Rotary Engine Equipped Racing Muffler
Borla

Borla

Borla XR-1 Multi-Core 3in Ctr-Ctr Round 16in x 6.25in Rotary Engine Equipped Racing Muffler

SKU: BOR400373

Mufflers

BOR XR-1 Mufflers...

A$582.17
LOW STOCK! Est Ship 3-5 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

XR-1(r) Multi-Core Racing Muffler. 3" Center Inlet/ 3" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Long body design works well on SUV & truck applications but can be used on a wide range of vehicles. 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 continuous-filament fiber (CFF) acoustic material 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.

Product Overview

Designed for rotary engine equipped vehicles, but can be used on other applications. Long body is perfect for truck applications. Reversible design for installation flexibility. Patented Multicore design for maximum power. Recommend for high horsepower applications. T-304 Stainless steel will never rust. 100% welded construction for strength. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. There is no 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.

Product Details

Body Height (in.):6.25
Body Height:6.250 in.
Body Length (in.):16
Body Length:16.000 in.
Body Width (in.):6.25
Body Width:6.250 in.
Construction:All Welded
Description:XR-1® Stainless Multicore Racing Mufflers
Grade Type:Performance
Inlet Connection Type:Pipe
Inlet Outside Diameter:3.000 in.
Inlet Position:Center
Inlet Size (in.):3
Inlet Type:Single Center
Main Piping Diameter:3.000 in.
Material:T-304 Stainless Steel
Muffler Count:1
Off Road Use Only:No
Outlet Outside Diameter:3.000 in.
Outlet Position:Center
Outlet Size (in.):3
Outlet Type:Single Center Outlet
Overall Length (in.):21
Overall Length:21.000 in.
Part Number:bor400373
Position:N/A
Prop 65 (C, R or CR):CR
Prop 65 - Long Label:WARNING: This product in the physical form it is sold does not present a hazard. However, operations including, but not limited to welding, brazing, or thermal cutting can expose you to chemicals including Chromium, Nickel, Cobalt, Arsenic, Cadmium and Lead which are known to the State Of California to cause cancer, birth defects and other reproductive harm. For more information go towww.P65Warnings.ca.gov
Prop 65 - Short Label:Proposition 65 Warning.JPG
Prop 65 Yes/No:Yes
Shape:Round
Tip / Outlet Finish:N/A
Title Extended:XR-1 Multi-Core 3in Center-Center 16inx6.25in Round - Rotary Engine Equipped Racing Muffler Part # 400373
Title:XR-1 Multi-Core Racing Muffler 3in Center Inlet/ 3in Center Outlet 6.25in Round x 16in Long Body Rotary Engine Equipped Vehicles

Application Summary

XR-1? Multi-Core Racing Muffler For Rotary Engine Equipped Vehicles - 3" Center Inlet/ 3" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Universal Parts. Reversible Design.

Part Type

Exhaust Muffler

Data: v4.2 - Upd: 2026-10-13 15:24:51

Features

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

Specifications

Product Attributes - UPC
808422003735
Product Attributes - Brand
Borla
Product Attributes - Notes
Multi core design. Features stainless steel sound absorbing material to protect against burnout.
Product Attributes - Quantity
Sold individually.
Product Attributes - Part Type
Mufflers
Product Attributes - Case Shape
Round
Product Attributes - Reversible
No
Product Attributes - Outlet Style
Standard, without tip
Product Attributes - Product Line
Borla XR-1 Racing Mufflers
Product Attributes - Inlet Location
Center
Product Attributes - Inlet Quantity
1
Product Attributes - Muffler Finish
Brushed
Product Attributes - Outlet Location
Center
Product Attributes - Outlet Quantity
1
Product Attributes - Muffler Material
304 stainless steel
Product Attributes - Inlet Diameter (in.)
3.00 in.
Product Attributes - Internal Construction
Straight-through core
Product Attributes - Outlet Diameter (in.)
3.00 in.
Product Attributes - Case Exterior Length (in.)
16.00 in.
Product Attributes - Manufacturer's Part Number
400373
Product Attributes - Case Outside Diameter (in.)
6.25 in.

Reference Information

Brand Name/s Borla
StreetFX SKU bor400373
SFX Item ID 4225268
Supplier Item Code 4225268
Manufacturer SKU 400373
Manufacturer UPC 808422003735
Alternative References xr-1, 3in, 16in, 6.25in

Brochures

Compatibility

XR-1? Multi-Core Racing Muffler For Rotary Engine Equipped Vehicles - 3" Center Inlet/ 3" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Universal Parts. Reversible Design.

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