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Nitrous Outlet 4 Cylinder Dual Stage Direct Port System - Two .122 Nitrous Solenoids/Two .177 Fuel Solenoids/Two Dual Passage Injection Rails/90 Degree Discharge Nozzles (Gas)(5-7-10 psi)(50-250HP)(10lb Bottle)

Marsoni M251S
Sale price$1131.99
Pay 4 payments of $283.00 a month.Shop Pay
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Nitrous Outlet 4 Cylinder Dual Stage Direct Port System - Two .122 Nitrous Solenoids/Two .177 Fuel Solenoids/Two Dual Passage Injection Rails/90 Degree Discharge Nozzles (Gas)(5-7-10 psi)(50-250HP)(10lb Bottle)Low Fuel Pressure (5 7 10 PSI) Flow Up To 800HP Four Cylinder Wet System Single Untapped Injection Rail Dual 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 nozzle per cylinder capable of flowing 200 HP each. High Quality Construction. Nitrous
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  • We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 2016 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Great purchase!
My child is 14 months and has been on the move for a long time, these shoes are so great, he moves great in them and never has a problem wearing them! They are slightly narrow so the strap doesn’t go all the way, but has never come undone!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 10, 2023
A
Verified Purchase
Amazon Customer
Omaha, US
★★★★★ 5
Worth every penny
My son’s favorite shoes! High quality, very durable, look nice even when they aren’t freshly cleaned. Easy to take on and off. Definitely worth the money! This color tends to go with everything. Such great support.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2021
S
Verified Purchase
Shannon
New York, US
★★★★★ 5
Perfect fit.
Color: Grey/Navy/Green, Size: 3.5 Big Kid
Nice looking shoes, Saucony is always very durable for my child and myself. Very comfortable and fit perfectly. Great for just hanging out or running.
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Reviewed in the United States on August 28, 2025
K
Verified Purchase
Keri Gradeless
Lake Worth, US
★★★★★ 5
👍
Super cute and comfortable!
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Reviewed in the United States on April 25, 2026
B
Verified Purchase
bld424
Lexington, US
★★★★★ 5
Love this style
This is a great playground shoe for my 4th grader. I love the unisex design. These shoes usually last 6 mo - until we need next size- but aren’t in same spotless shape that Keens are for passing down to next sibling. Still, they are far from bad shape after six months of abuse. Way better than UA or Nikes in our experience. I had adult version and had heavy rotation with other shoes, and still lasted 5 years before I gave to my growing son, and he trashed them in 6 mo wearing as lawn mowing shoes. As an adult, I add an arch support or metatarsal support insole. My kid hasn’t indicated it needs one for comfort - but it’s not as cushy at all compared to Saucony running shoes.
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Reviewed in the United States on June 20, 2023

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