MTM Hydro 3/8" Fixed Chemical Injector with 2.1mm Orifice

Marsoni

M251S

$238.59

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

MTM Hydro 3/8" Fixed Chemical Injector with 2.1mm OrificeMTM Hydro's Fixed Chemical injectors were developed for use in a downstream chemical injection system. Downstream refers to 'after the pump and unloader' where the injector operates through the use of the Venturi effect. When the low pressure side of a dual lance is opened, the chemical injector's orifice is, then, the point of restriction which immediately creates a vacuum and begins drawing chemical. All MTM Hydro chem injectors have a maximum

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I love K & N air filters and always install them in my cars. This eliminated my cars Turbo lag in my 2019 Honda Civic Ex which has a 1.5L Turbo. Acceleration has improved and makes the car louder (I also have dual exhaust) I love how you don't have to change or clean it for 50,000 miles!! I know it's expensive but will last forever! Only issue was it was very difficult to install and a pain but this is more Hondas fault as I could not fully remove the plastic case where this filter goes under the hood even with tools.

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Reviewed in the United States on November 23, 2019

Verified Purchase

R. A

Natrona Heights, US

★★★★★ 5

Works great

Perfect fit

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Reviewed in the United States on August 7, 2025

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Evan

Louisville, US

★★★★★ 5

More power and better mileage

Put this in my 2017 CRV and have noticed much more pickup and better mileage overall. Usually I average 22mpg with mixed driving and this has me hovering around 25mpg and I get to have extra power on top of that. Install was straightforward and a breeze. Whole project is done in ten mins and your car is instantly more fun and getting improved MPGS

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Reviewed in the United States on November 30, 2024

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Louisville, US

★★★★★ 5

for lexus rx 350

well made and fits lexus rx350 fine

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Reviewed in the United States on September 4, 2025

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Amazon Customer

Boise, US

★★★★★ 5

Improves the air quality of you vehicle

Perfect fit. You can tell the difference in the quality air recirculation. Without a doubt an improvement over inexpensive filters. I highly recommend replacing any auto air conditioning and heating with this filter.

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Reviewed in the United States on March 18, 2026