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Extreme Mass by International Protein

Marsoni M251S
Sale price$89.95
Pay 4 payments of $22.49 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Extreme Mass by International ProteinEXTREME MASS is a powerful weigh gainer formulated with a blend of five fast, medium and slow release proteins, a unique combination of carbohydrates, and high calorie Canola, Sunflower, and MCT oils, to ensure a maximum anabolic state and superior mass gains. One main feature of Extreme Mass is the sustained release of protein over several hours ensuring the maximum availability of protein to keep the body Anabolic, and stop the breakdown of your own
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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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1368 reviews
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Verified Purchase
Joel
Los Angeles, US
★★★★★ 5
2017 honda civic
fits perfectly on my 2017 honda civic and easy to install. its an above average filter as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
T
Verified Purchase
Tracy K
Lake Worth, US
★★★★★ 5
Top of the line high quality
Top of the line great filter
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Reviewed in the United States on March 24, 2026
B
Verified Purchase
Brian J.
San Leandro, US
★★★★★ 4
Good fit works well, once I figured installation
Does not show air flow direction
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
A
Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 5
Good product
Excellent product, fast delivery, good price. I would recommend this company.
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Reviewed in the United States on February 8, 2026
S
Verified Purchase
Stacey O.
Natrona Heights, US
★★★★★ 5
Fits Honda clarity
Easy and correct fit for Honda clarity
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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