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 10 - Sep 15

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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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4.7 ★★★★★
Based on 16 reviews
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Verified Purchase
Christopher
New York, US
★★★★★ 5
Slip-on ready and great quality
Size: 9, Color: Black
These shoes were stuff for the first half hour but then feel great. Well worth the chance and money. Great quality and slip-on easy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
D
Verified Purchase
Derek Preston
Battle Creek, US
★★★★★ 5
Great buy
Size: 11, Color: Tan
Great fit comfortable look good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
M
Verified Purchase
mike t.
San Leandro, US
★★★★★ 5
Great shoes
Size: 14 Wide, Color: Black
My shoes look good and feel good and now I’m going to purchase the brown pair I saw
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
N
Verified Purchase
Nicholas D. Clark
Battle Creek, US
★★★★★ 4
Don’t buy for restaurant industry
Size: 10.5, Color: Black, Size: 10.5, Color: Black
Good looking shoes, fairly comfortable and good value based on the description shared, so I don’t feel it’s fair to rate them lower than 4 stars. I had high hopes for them based on previous reviews from others saying they wore them in the food and beverage industry that mentioned their quality and durability, however I strongly recommend looking elsewhere if you do. I purchased these to wear working in a full service upscale restaurant and in less than two months have managed to have torn the material on the middle exterior section and the bottoms of the shoes are already completely worn down. Good design, but the durability needs to be improved if they’re to hold up for that industry.
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Reviewed in the United States on July 18, 2025
D
Verified Purchase
Damon Richards
New York, US
★★★★★ 1
DO NOT BUY (lasted less than 7 months)
Size: 11, Color: Black, Size: 11, Color: Black
I bought these for work as a bartender in August of 2025. By December, the tops were scuffed, frayed, and peeling beyond repair, and by February, the soles were coming off. I’ve never had a pair of shoes with such low quality.
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Reviewed in the United States on April 11, 2026

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