★★★★★ 5
Very good filter
Size: CA12290-Premium
Very good filter
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
Nitrous Express 4500 Assassin Plate Pro Power Nitrous Kit (100-500HP) w/10lb Bottle
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Nitrous Express 4500 Assassin Plate Pro Power Nitrous Kit (100-500HP) w/10lb BottleNitrous Express. 4500 Assassin Plate
Quick Dispatch:
Your Nitrous Express 4500 Assassin Plate Pro Power Nitrous Kit (100-500HP) w/10lb Bottle orders ship within 1-2 business days.
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- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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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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4.4 ★★★★★
Based on 2091 reviews
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Product Reviews
★★★★★ 3
Not 99.9 %
Size: CA12290-Premium
Only 98% efficient. Says 99.9 in the ad. There is a huge difference between those two efficiencies.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
★★★★★ 5
Accord
Size: CA12290-Premium, Size: CA12290-Premium
Fit was perfect on 2018 accord, delivery fast and packaging intact.
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Reviewed in the United States on August 18, 2025
★★★★★ 5
Prefect fit
Size: CA12290-Premium, Size: CA12290-Premium
Excellent product! OEM Replacement. If you are buying for horse power gains. You will not really notice any difference
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2025
★★★★★ 5
K and N is the best
Size: CA12290-Premium
In my opinion, you can’t buy a better air filter. Been buying them for all my cars since the 1990s.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2024
