Skip to content

Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb Bottle

Marsoni M251S
Sale price$574.62
Pay 4 payments of $143.66 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb BottleNitrous Express. 4150 Assassin Plate Assassinate the competition with the Assassin plate system. The Assassin is the most technically advanced single stage plate ever designed. The CNC machined design integrates the nitrous and fuel discharge ports into the outer perimeter. The Assassin offers a unique perimeter spray pattern that assures perfect nitrous fuel distribution. Which in turn solves the problems commonly found on single plane manifolds
Easy Shipping

Quick Dispatch:

Your Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb Bottle orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb Bottle ships.

Need Help?
Questions about Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb Bottle, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/10lb Bottle in your area.

Get Shipping Estimates

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 1540 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
chris s
Bozeman, US
★★★★★ 5
Fit Mercury 150 saltwater 2 stroke great!
These fit my Mercury 150 perfect. Took it out for a test run and engine ran great with no overheating issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
R
Verified Purchase
Robert Werkhoven
Battle Creek, US
★★★★★ 5
Work’s okay
They work ok, as expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
R
Verified Purchase
Ron McCrea
Lexington, US
★★★★★ 5
Just as good as OEM
Exactly what I expected...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 9, 2025
W
Verified Purchase
wes
Whiting, US
★★★★★ 5
Fit perfectly
Truly impressive, bought these and a set from a us boat supplier a thermostat made in the USA . They came with the gasket separate . I could not figure out how to put it together . I used these in my mercury optimax 135 hp . They fit perfectly and appear to be working great at a quarter the cost .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2024
A
Verified Purchase
Amazon Customer
Draper, US
★★★★★ 5
Handles the power
Size: 5FT, Style: 8AWG
Used for leads to handle high Amperage. Replaced cheesy 12 gauge leads that came with the unit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026

recommand products