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Nitrous Express All GM EFI Single Nozzle Nitrous Kit w/(35-150HP) 5lb Bottle

Marsoni M251S
Sale price$452.50
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Get it in 3 business days with 1 day shipping. Friday, May 29
Nitrous Express All GM EFI Single Nozzle Nitrous Kit w/(35-150HP) 5lb BottleIf you want the best, this is it. The NX Stage 1 EFI nitrous system is the top of the line EFI power booster on the market. From the highest flowing solenoids, to our patented Shark nozzle, this system screams nothing but quality. NX has a system for every EFI car in the world. Available in horsepower levels from 35 50 75 for most 4 and 6 cylinder cars, and up to 150 for 8,10, and 12 cylinder engines. This NX EFI Stage One system comes complete with a
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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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4.7 ★★★★★
Based on 727 reviews
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Product Reviews
A
Verified Purchase
April Lawrence
West Palm Beach, US
★★★★★ 5
Gorgeous ring!
Gorgeous ring!!!! Love 💜
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2020
M
Verified Purchase
Miss Tish
Grantham, US
★★★★★ 5
Beautiful forever ring
Ring Size: 8.5, Ring Size: 8.5
This ring is absolutely beautiful great workmanship perfect size fit. I love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
A
Verified Purchase
A lady in Colorado
Phoenix, US
★★★★★ 5
Lovely
Ring Size: 6.25
The only word for this ring is "lovely." It took a long time to get to me as I ordered it January 30, 2026 and it arrived the third week of February but to be honest, it was worth waiting for.
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Reviewed in the United States on February 24, 2026
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 5
Perfect fit, both literally and figuratively.
Perfect fit (after I got my ring size correct!) and looks great next to my large engagement ring. Doesn't take away from the engagement ring, but enhances it with the simple, but delicate two-tone white and yellow gold design,
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Reviewed in the United States on January 8, 2026
M
Verified Purchase
MTS
Houston, US
★★★★★ 3
Unremarkable
Ring Size: 7
The photos were expertly taken for sure. The ring is nice, decent quality, 14k as advertised but the design and stones are less than exciting. It’s nice, that’s about the best I can give it.
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Reviewed in the United States on December 24, 2025

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