★★★★★ 5
Very satisfied
Product was as described.
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Reviewed in the United States on July 24, 2025
Nitrous Express 4500 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Nitrous Express 4500 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb BottleNitrous Express. 4500 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
Quick Dispatch:
Your Nitrous Express 4500 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
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You'll receive a tracking link by email once your Nitrous Express 4500 Assassin Plate Stage 6 Nitrous Kit (50-300HP) w/5lb Bottle ships.
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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
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4.4 ★★★★★
Based on 1677 reviews
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Product Reviews
★★★★★ 1
impeller
The equipment was okay. However, there's no way of verifying what outdrive.It was four, so obviously ordered the wrong one
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Reviewed in the United States on March 7, 2026
★★★★★ 5
Quality parts and as described
Color: Black
Product worked great, had all pieces and parts required for the job. Could have used instructions, but I was able to search and find it on YouTube.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Great replacement kit
Color: Black
Water pump kit fits perfectly on my 200hp mercury outboard 2000 model. Excellent quality matching the OEM part I replaced from wear & tear. There where however extra gaskets & O-rings that go nowhere on my outboard
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Reviewed in the United States on September 1, 2024
★★★★★ 5
Johnson 90 sea pro VLSIF
Color: Black
All parts required for proper water pump change were in kit. All parts were grouped and packaged. All made of solid materials sturdy.
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Reviewed in the United States on March 19, 2026
