Nitrous Express 4500 Assasin Plate RNC Up to 750hp 15lb Bottle

Nitrous Express 4500 Assasin Plate RNC Up to 750hp 15lb Bottle

Marsoni

M251S

$727.32

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

Nitrous Express 4500 Assasin Plate RNC Up to 750hp 15lb BottleNitrous Express. N2O Injector 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

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I noticed the engine running much quieter using this oil. The pour mouth is pretty unique for this brand, you can just open the interior cap, pull up the accordion neck and pour into the engine which provides better control over traditional wide mouth, thus less messy. This oil rarely goes on sale and is typically 1.5x to 2x more expensive than the more common US brands.

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Reviewed in the United States on August 28, 2025

Verified Purchase

Cooch

Cuba, US

★★★★★ 5

Best synthetic oil BMW

Excellent synthetic oil BMW 328I

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Reviewed in the United States on February 6, 2026

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Malu buys everything

Massapequa, US

★★★★★ 5

Last long

Love it ! Since I have a BMW this oil it’s good for it . The Price is good . Last long . No engine noise Or oil burning. Even the color looks good after 3 months.

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Reviewed in the United States on March 9, 2026

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Brian Classen

Natrona Heights, US

★★★★★ 5

FRIENDLY REMINDER Don't overtighten the bolts

MUCH better than the cheap plastic OEM part, Just a reminder though, these thread into an aluminum block so be very careful to start them finger tight first, then evenly tighten both bolts to push the fitting into the chamber. If you don't, it will slightly misalign and you run the risk of stripping the threads. The one comes with the replacement o ring, and be sure to get some antifreeze on that seal prior to attempting to push it into the chamber. IT IS A TIGHT FIT, but that's what you want, so just be careful. You might also want an extra hose clamp on hand, as the one that came with this began to bend as it got tight, so I had to replace it for peace of mind. Overall, great product though.

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Reviewed in the United States on January 9, 2026

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Dklnyc

Waukegan, US

★★★★★ 5

Strong product

Great quality

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Reviewed in the United States on March 11, 2026