Engine Breather Valve - Reed Type

Marsoni

M251S

$38.34

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

Engine Breather Valve - Reed TypeReed Type Positive Crankcase Ventilation Valve. Valve hooks to engine top breather vent and allows expelled air out but reed prevents air re entering quickly so a very small vacuum is created in the crankcase. A small power increase has been noted during dyno tests (most notable on pre 1977 engines) and the crankcase vacuum helps prevent crankcase pressure from pushing oil past oil seals and case joints. Part Number: 15 0677

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The ball bearings make them roll smooth. I've put plenty of pressure through them and no bending or breaking. The middle sized unit is probably the most useful. The small one has it's uses but can act like a pizza cutter and easily go through sound deadening mats. The large one has a little too much surface area to get a good crush on the mats.

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Reviewed in the United States on August 31, 2025

Verified Purchase

Calvin Stafford

Boise, US

★★★★★ 5

Works great, good price

Makes installing sound deadening panels a breeze. A little elbow grease required but makes for perfect contact with the sheet metal and butyl.

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Reviewed in the United States on April 19, 2026

Verified Purchase

Jare

Charlottesville, US

★★★★★ 5

Well Made Tools!

I have been installing Kilmat in my early 74 Datsun 260Z restoration and these tools are very nice for the price. I like them because they actually have ball bearings and move smoothly over the matting. The size selection is very handy as well and even has some nice finished wooden handles.

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Reviewed in the United States on May 9, 2026

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Placeholder

Los Angeles, US

★★★★★ 5

Perfect applicators tool

Tool worked great. Bonds sound proofing to metal perfectly.

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Reviewed in the United States on April 9, 2026

Verified Purchase

this guy

San Leandro, US

★★★★★ 5

Must have

These things a freaking AWESOME! If you're doing a big sound deadner job, you need thees! The 3 different sizes are perfect for the different shapes in the floor pans. Well built, good quality and they have a nice weight to them. Just buy them and thank me later. For $15.00 you can't go wrong.

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Reviewed in the United States on March 12, 2026