Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle

Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle

Marsoni

M251S

$567.99

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/5lb BottleAssassinate 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, particularly small and big block Fords.

Easy Shipping

Quick Dispatch:

Your Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb 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/5lb Bottle ships.

Need Help?
Questions about Nitrous Express 4150 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb 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/5lb Bottle in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

Reliable synthetic blend for high mileage vehicles. Castrol GTX High Mileage 20W-50 is our go-to oil for older vehicles and high-mileage units in our dealership inventory. The synthetic blend formula provides good protection for engines with significant wear. The 20W-50 viscosity helps reduce oil consumption in higher mileage engines. We've had excellent results using this in trucks and SUVs with over 100k miles. The seal conditioning additives help prevent leaks. Price point is reasonable for a quality synthetic blend. The 5-quart bottles are convenient for standard oil changes. Castrol quality and reputation you can trust. Solid choice for keeping high-mileage vehicles running strong.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 16, 2026

Verified Purchase

Bernard G.

Draper, US

★★★★★ 5

Hustler raptor SD hydro oil

Size: 5 Quarts

Good quality oil used for my hustler raptor SD hydro oil. Far better price than buying a 100 dollar kit. My total cost was 40 bucks with filters.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 14, 2026

Verified Purchase

Bert

Carnegie, US

★★★★★ 5

Quality oil

Size: 5 Quarts, Pack of 3

I use nothing but Castrol GTX high mileage 20w50 oil and Wix oil filters in my 2000 Nissan Frontier with 317,000 highway miles on the engine. I change the oil every 3,000 miles and engine is still going strong!

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 19, 2026