★★★★★ 5
good value
Configuration: 4-Stroke, Size: 1 GA
good value and marine rating on the lable
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Reviewed in the United States on April 26, 2026
Borla XR-1 Multicore 2.5in Inlet 4in Outlet RDX 14in
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Borla XR-1 Multicore 2.5in Inlet 4in Outlet RDX 14inSKU: 401383 UPC: 808422013833 Borla 401383 XR 1 Multi Core Racing Muffler 2. 5in Center Inlet 2. 5in Center Outlet 4in Round x 14in Body Universal Fit The Borla 401383 XR 1 Multi Core Muffler delivers aggressive racing sound and performance gains for any vehicle. This universal muffler features a compact 4 inch diameter by 14 inch long body with 19 inch overall length and 2. 5 inch center inlet outlet, ideal for cars with limited ground clearance.
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Your Borla XR-1 Multicore 2.5in Inlet 4in Outlet RDX 14in orders ship within 1-2 business days.
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- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.3 ★★★★★
Based on 1942 reviews
Sort
Product Reviews
★★★★★ 5
Will buy again!
Configuration: 4-Stroke, Size: 1 GA, Configuration: 4-Stroke, Size: 1 GA
This is my second time using this oil to service my 2022 Mercury 90 outboard. Excellent oil! Engine runs extremely smooth. The jug was very easy to pour from. No smoke from the engine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 5
Good
Configuration: 4-Stroke, Size: 1 GA, Case of 3
Good
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Reviewed in the United States on May 15, 2026
★★★★★ 4
Oily situation lol
Configuration: 4-Stroke, Size: 1 GA
Honestly how do you write a review of this product? I would have to run tests for years on multiple oils on various engines to do so. The value was good however and shipping was great
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Reviewed in the United States on March 31, 2025
★★★★★ 5
Use the best oil to protect your investment
Configuration: 4-Stroke, Size: 1 GA
Great product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 30, 2025
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