SKU: 49009427865

Borla XR1 Multicore Muffler (400372)

Sale price$120.60 Regular price$134.00
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Ships within 48 hours · Estimated delivery Sep 15 - Sep 20

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Description

Borla XR1 Multicore Muffler (400372)Borla XR 1 Multi Core 3" Center Center 12" x 4. 25" x 7. 88" Rotary Engine Equipped Racing Muffler (400372) BORLA's XR 1 raceline products are the choice of today's hottest racers. Featuring a patented uninterrupted flow design and multi core technology, BORLA's XR 1 mufflers actually outflow a straight piece of pipe. XR 1 race products are made in the USA and constructed of high quality T 304 stainless steel for track tough durability. They meet the

Borla XR-1 Multi-Core 3" Center-Center 12" x 4.25" x 7.88" - Rotary Engine Equipped Racing Muffler (400372)

BORLA's XR-1® raceline products are the choice of today's hottest racers. Featuring a patented uninterrupted-flow design and multi-core technology, BORLA's XR-1® mufflers actually outflow a straight piece of pipe. XR-1® race products are made in the USA and constructed of high-quality T-304 stainless steel for track tough durability. They meet the strictest noise requirements. Multi-Core, Collector, and Bullet Racing mufflers feature steel wool packing for sound control. Sportsman mufflers feature high temperature continuous filament fiber (CFF) for sound control. Hands down, BORLA®’s XR-1® raceline parts offer the best balance of sound and power.

Features:

  • T-304 stainless steel will never rust — our thickest material.
  • Free-flow design for improved performance.
  • 100% welded construction is track-tough.
  • Multicore, Collector, and Bullet Racing muffler feature steel wool packing for sound control.
  • XR-1®'s race-proven design attenuates sound without restricting flow.
  • Sportsman mufflers feature high temperature continuous filament fiber (CFF) for sound control.
  • Reversible design for installation flexibility.
  • Recommended for high-horsepower racing applications.

Designed for rotary engine equipped vehicles, but can be used on other applications. Compact design is perfect for vehicles with limited space. 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. Steel wool packing 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49009427865

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4.6 ★★★★★
Based on 13 reviews
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Verified Purchase
ballpeen
Los Angeles, US
★★★★★ 5
Better than just a patch
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
Do what they are suppose to do, easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
D
Verified Purchase
dtep955
Omaha, US
★★★★★ 5
worked great for Me
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
I have only used two patches so far, and they have worked just fine, You do have to have some tools like a buffing wheel and the vulcanizing glue and a roller wheel to make these patches work as they should, but I am happy with these patches, especially since nobody will repair a motorcycle tire, so this is Your only way to fix them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 24, 2025
R
Verified Purchase
Ruben vasquez
Massapequa, US
★★★★★ 5
Patches
Size: 0.35 x 2.36 Inch
Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
J
Verified Purchase
Judy
Waukegan, US
★★★★★ 5
Good quality
Size: 50-Foot, Style: 90° Locking End
Good quality and has that special little notch that allows it to fit into my receptacle easily. It. It has a nice long, reach 100 feet.
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Reviewed in the United States on May 20, 2026
A
Verified Purchase
Andrew Weinberg
Whiting, US
★★★★★ 5
Works great and fits well
Size: 50-Foot, Style: 90° Locking End
No issues. Not sure why people people.cmaim it doesn't seat...its does.and works great. Im in a desert environment in Nevada and it is putting up with the heat well.
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Reviewed in the United States on June 8, 2026

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