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Borla 3in Inlet/Dual 2.25in Outlet Center/Dual Oval ProXS Muffler

Marsoni M251S
Sale price$187.99
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Get it in 3 business days with 1 day shipping. Friday, May 29
Borla 3in Inlet/Dual 2.25in Outlet Center/Dual Oval ProXS MufflerSKU: 40670 UPC: 808422406703 Borla 40670 ProXS Muffler 3in Center Inlet Dual 2. 25in Outlets 4x9. 5in Oval 19in Body Universal The Borla 40670 ProXS Muffler delivers aggressive exhaust tone with power gains for trucks cars SUVs in custom systems. This universal oval muffler fits 3in piping via center inlet and dual 2. 25in rear outlets or reverses for dual inlet single outlet setups. Gain torque fuel economy and Borla Sound of Power in any performance
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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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4.6 ★★★★★
Based on 65 reviews
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Verified Purchase
Amazon Customer
Carnegie, US
★★★★★ 5
Nice quality
Had to return due to our mistake but the mechanic said it was good quality. Ordered the correct size and worked great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2025
K
Verified Purchase
katelyn traut
Fort Morgan, US
★★★★★ 5
Perfect fit
Worked great for a 1965 mercury thunderbolt 150hp
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2025
L
Verified Purchase
Lawrence Brown
Phoenix, US
★★★★★ 5
MerCruiser Replacement Parts
OEM quality MerCruiser Alpha 1 Gen1 replacement part. Everything you need and some things you don't because it's a universal kit that works for several models.
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Reviewed in the United States on July 19, 2025
O
Verified Purchase
Owen Shirk
Bozeman, US
★★★★★ 5
OEM is always the answer
No reason not to go OEM for this! Came with every possible gasket and seal I could need. Specifically for my Alpha One Gen 1 it took maybe 25-30 min to completely install. While you’re there check the base plate for wear and the other surrounding items like your water tube. Rather keep the lower unit off for an extra day to get another part than a catastrophic failure.
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Reviewed in the United States on September 9, 2025
T
Verified Purchase
Taylor 🤍
Waukegan, US
★★★★★ 5
Husbands things
My husband bought this. I don’t know much about it but he has zero complaints. He bought it for a boat. He has fixed up 2 boats, sold one & we kept the other. So he apparently knows what to buy & how to use it.
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Reviewed in the United States on November 6, 2025

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