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ZEX Nitrous System ZEX Race EFI
ZEX Nitrous System ZEX Race EFI
ZEX Nitrous System ZEX Race EFI
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ZEX Nitrous System ZEX Race EFI

Marsoni M251S
Sale price$360.98
Pay 4 payments of $90.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
ZEX Nitrous System ZEX Race EFIZEX Blackout Nitrous Systems are the newest addition tothe ZEX family. With unprecedented looks, performanceand power potential, and like all ZEX nitrous systems, theBlackout kits incorporate the most technologicallyadvanced performance features available, including thepatented ZEX Active Fuel Control. This feature automaticallyadjusts the nitrous fuel enrichment so your enginenever runs too rich or too lean. Power settings vary for eachapplication
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Your ZEX Nitrous System ZEX Race EFI orders ship within 1-2 business days.

Delivery Options:

  • 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 2017 reviews
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Product Reviews
M
Verified Purchase
Molar1
San Leandro, US
★★★★★ 5
Works and fits my vehicle.
Size: 5424WS, Style: Workshop
The price is reasonable and was delivered on time. It’s a filter so there’s not much you can grade this on unless you do scientific analysis. Be certain to buy the filter that fits your car.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
A
Verified Purchase
A A
Louisville, US
★★★★★ 4
Good filter
Size: 5424WS, Style: Workshop
It seems to be working. It’s not something that will make a tangible difference, but it fit my car and was easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2024
M
Verified Purchase
MagicMan34
Alexandria, US
★★★★★ 5
Top quality at great price
Size: 5424WS, Style: Workshop
These are great filters for the money. The car dealer wanted 80 dollars to replace it. This can be done by anyone and buying it on here is even more savings. Do not fall for it at the dealer. Save your hard earned money!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
A
Verified Purchase
Aliza
Natrona Heights, US
★★★★★ 5
Excellent Engine Air Filter — Keeps Your Engine Breathing Clean!
Size: 5424WS, Style: Workshop
It’s a high‑quality replacement that does exactly what you want from an engine air filter — it helps protect your engine and keeps performance strong. Right away you can tell this is a well‑made part. The filter media has lots of pleats and high‑velocity cellulose material that’s designed to trap dirt and contaminants before they get into your engine, which helps reduce wear and tear on vital components. It offers up to ~98% filtration efficiency, so you know the incoming air is much cleaner and better for performance and fuel efficiency.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 26, 2026
A
Verified Purchase
Amazon Customer
Lowell, US
★★★★★ 5
Great product
Size: 5424WS, Style: Workshop
Perfect for DIY filter change.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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