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Nitrous Outlet 4 Cylinder Direct Port System - .122 Nitrous Solenoid/.177 Fuel Solenoid/Distribution Blocks/Annular Degree Discharge Nozzles (Gas)(5-7-10 psi)(50-250HP)(12lb Bottle)

Marsoni M251S
Sale price$1382.49
Pay 4 payments of $345.62 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Nitrous Outlet 4 Cylinder Direct Port System - .122 Nitrous Solenoid/.177 Fuel Solenoid/Distribution Blocks/Annular Degree Discharge Nozzles (Gas)(5-7-10 psi)(50-250HP)(12lb Bottle)Low Fuel Pressure (5 7 10 PSI) Straight Blow Through Nozzle Flow Up To 400HP Four Cylinder Wet System Distribution Blocks Single Stage All Hardware, Fittings and Accessories Included Includes Jetting For 50 100 150 200 250HP High Horsepower. Nitrous Outlet's 4 cylinder direct port systems are designed to be high flowing for high horsepower applications. This system comes with one SBT wet nozzle per cylinder capable of flowing 200 HP each. High Quality
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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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4.2 ★★★★★
Based on 1721 reviews
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Verified Purchase
Eddie S.
Natrona Heights, US
★★★★★ 5
Great value and working started
Great starter. I had ordered a cheaper option before this and it just hold up. When this one arrived I could tell I made the right decision right out of the box. It looked, felt and worked like the OEM one. No shims just a good working starter. Spend a few extra bucks and save time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
B
Verified Purchase
Bil R.
Port Orchard, US
★★★★★ 5
Perfect fit for 5.7 Mercruiser
Great fit for mercruiser 5.7 Have had it installed for about 6 months and still working great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
A
Verified Purchase
Arelius Walker
Fort Morgan, US
★★★★★ 5
Great Buy!!! 5-Star!!!
Bolted up! Boat starts like the original starter! Great Buy!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
N
Verified Purchase
neil d.
Cuba, US
★★★★★ 4
Seems good but not a direct replacement
This starter did work but it was not a direct replacement for the starter in my 1986 Malibu skier with 5.7 mercruiser direct drive. This starter is a mini-starter, which is great in that it’s smaller and lighter but it meant that my starter bolts were too long and I had to add 3/8” stack of washers under the bolt heads. The bracket that supports the front of the starter to the engine block was also not able to be used because the new starter is shorter, although with the lighter starter, that bracket is probably no longer necessary. First few starts have been fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025
J
Verified Purchase
Jerry Sonnier
West Palm Beach, US
★★★★★ 5
Fit Great. Works great.
Fit perfectly Mercruiser 4.3
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026

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