Nitrous Express 4150 Assassin Plate Pro Power Nitrous Kit (100-500HP) w/5lb Bottle

Nitrous Express 4150 Assassin Plate Pro Power Nitrous Kit (100-500HP) w/5lb Bottle

Marsoni

M251S

$611.29

Get it in 3 business days with 1 day shipping. Friday, May 29

Nitrous Express 4150 Assassin Plate Pro Power Nitrous Kit (100-500HP) 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.

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This works really well! I used it several times and really saw a difference. Unfortunately I had a root canal done and the following day I decided to whiten and I thought I was going to die! I didn’t know my front tooth was going to be that sensitive from the tooth canal. That was my fault and only telling this story as a warning! Do not use this after dental work unless your dentist says ok! Otherwise it works amazingly!

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Reviewed in the United States on May 2, 2026

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Zero

Whiting, US

★★★★★ 4

Easy to use

Size: 4 Count (Pack of 1)

Continued use is needed for best results

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Reviewed in the United States on May 14, 2026

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Nicole

Grantham, US

★★★★★ 5

No sensitivity issues and works!

Size: 4 Count (Pack of 2)

I have what I would consider sensitive teeth and this doesn’t bother them one bit. I have used nightly for about 5 nights and can see a difference in color but again, no pain or sensitivity problems! I would recommend to anyone who asks what product to get for whitening teeth.

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Reviewed in the United States on February 25, 2026

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Julian Barrett

Los Angeles, US

★★★★★ 5

Impressive work...

I've used those whitening kit and it's my first time with something like this. I've done the charcoal toothpaste and working toothpaste and they made small changes to my teeth over a long period of time, but the whitening kit was a bit different. I applied the gel on my teeth and used the LED mouthpiece. There was a small change and a bit of sensitivity in my teeth so I waited a few days for the pain to reduce. I didn't realize that the sensitivity feel for for that very purpose. After a few days I applied another coating and used the sensitivity gel. The results were significant my teeth were two chart shades different. I was very impressed. I would recommend this for whitening your teeth, but if you feel a bit of sensitivity after use, use the sensitivity gel and red light setting on the mouthpiece. It really does help.

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Reviewed in the United States on February 7, 2026

Verified Purchase

Whiting, US

★★★★★ 5

Perfect Match with the WhiteBrite mouth whitener

Size: 4 Count (Pack of 1)

I purchased the White Brite teeth whitener unit & ordered the gel pens to go with it: this review is for the gel - however have to mention the little mouth brighter is AMAZING! Works as well as getting 500$ whitening at dentist! 🦷 … The gel is a perfect match for it…I used continuously for one week - saw a 85/90% Highly recommend the mouth whitener & gel pen!

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Reviewed in the United States on May 17, 2026