Nitrous Express Instaboost EFI Jet Pack

Marsoni

M251S

$107.54

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

Nitrous Express Instaboost EFI Jet PackNX Jets are manufactured on CNC equipment, and are guaranteed to be within . 0005 of specified jet size. In recent testing, using the same jet size, NX jets out flowed the competition by 35%! That's right 35% more flow through the same orifice, how you ask? The NX jet was designed to be more than just a hole in a piece of brass; its contoured inlet and multi stepped outlet allow turbulence free flow with no restrictions. Warranty Installation

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Your Nitrous Express Instaboost EFI Jet Pack orders ship within 1-2 business days.

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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.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

I bought these shoes for my daughter to wear to kindergarten. They wear navy uniforms and she loves pink so I thought these were perfect. I ordered her size according to the size chart (but didn’t check width because she’s never needed wide shoes in the past). The normal width were too tight on her toes but the length was right. I returned them for the wide and they are perfect. 2 months into school they still look brand new. Just be sure to check both length and width. I printed a measuring guide from Saucony’s website.

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Reviewed in the United States on October 4, 2021

Verified Purchase

RJS

Port Orchard, US

★★★★★ 5

Nice, Tough & Comfortable!

Size: 6.5 Wide Big Kid, Color: Black

Bought as an everyday school shoe for my 10 year old son. He likes them a lot and is holding up great through rough boy play, and they still look good after a couple months now.

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Reviewed in the United States on January 20, 2026

Verified Purchase

Peri Nikolas

Chelsea, US

★★★★★ 5

Great

Size: 4.5 Big Kid, Color: Pink/Purple

perfect

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Reviewed in the United States on May 12, 2026

Verified Purchase

FLbookworm22

Whiting, US

★★★★★ 5

Pink and purple perfection

Size: 13 Little Kid, Color: Pink/Purple, Size: 13 Little Kid, Color: Pink/Purple

Fits great and perfect colors for my (not so) little. This is her first pair of "tie" shoes so we're still learning, but the laces are a good length for teaching and practicing. She says they're very comfortable too.

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Reviewed in the United States on March 27, 2026