★★★★★ 5
Good product
Worked for what I needed. Fit great and easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
Vibrant 4 Ply Reducer Couper 4.0in ID x 3.75in ID x 3in Long - Black
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Vibrant 4 Ply Reducer Couper 4.0in ID x 3.75in ID x 3in Long - BlackSKU: 19742 UPC: 690092179236 Vibrant Universal 4 Ply Reducer Coupler 4. 0in ID x 3. 75in ID x 3in Long Black This Vibrant Performance reducer coupler steps down precisely from 4. 0 inch inner diameter to 3. 75 inch inner diameter over 3 inches for seamless custom air intake and turbo piping fabrication. It fits universal performance applications on modified cars trucks and imports with aftermarket intake systems. Black 4 ply silicone construction
Quick Dispatch:
Your Vibrant 4 Ply Reducer Couper 4.0in ID x 3.75in ID x 3in Long - Black 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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4.4 ★★★★★
Based on 1442 reviews
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Product Reviews
★★★★★ 5
Old Merc Inline 6s - 1500, 1400, 1250, 1150
This is the second time I purchased from them. The kits are good quality, and impeller is durable. Pictures is the initial one I purchased from them two seasons ago. It had hundreds of hours on it, plus me accidentally cooking it for 3 mins without water hooked up to the engine - which is why I purchased it again. Given 2 seasons of use and my recent screw up it held up well.
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Reviewed in the United States on August 11, 2024
★★★★★ 4
Merc black max 150
Good fit
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Reviewed in the United States on October 16, 2024
★★★★★ 5
Best bang for your buck kit!
Can’t beat the price by any means. Total rebuild kit for Mercury 115 outboard for less than half the price and all high quality parts nothing cheap about this kit at all except the price. Highly recommend
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Reviewed in the United States on March 30, 2024
★★★★★ 5
great
great fit and worked flawless
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Reviewed in the United States on September 4, 2024
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