STM Valve Cover Fittings for Evo 4/5/6/7/8/9

STM Tuned Inc.



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Always looking for ways to make the engine bay cleaner, lighter and easier to work with, the STM Aluminum Valve Cover Fittings allow you to simply install -AN lines and fittings for a catchcan or breather right onto your Evo 4/5/6 or 7/8/9 valve cover. Please review all fitment notes below.

Install Notes:
The fitting itself is a very tight fit, but we would definitely recommend a touch of glue or epoxy to help hold it in place in the valve cover upon install. We recommend the ThreeBond Gasket Maker.

-6AN Front & Rear Set

For Evo 8/9 USDM valve covers.
-6AN Front

Fits Evo 4/5/6/7/8/9 valve covers.
-6AN Rear

Fits Evo 8/9 USDM valve covers.

Fits with the OEM PCV collar/grommet.
The Evo 8/9 MN158504 collar is unfortunately discontinued.
-6AN Rear with JDM Grommet

Fits Evo 4-9 JDM valve cover. Requires OEM 1057A033 grommet. (Included)
-10AN Rear USDM

Fits Evo 8/9 USDM valve covers only.

-10AN Rear JDM

Fits Evo 4-9 JDM valve covers only. The rear opening on the JDM covers is just a touch bigger than the USDM.

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Customer Reviews

Based on 7 reviews
Alexis Veyret Delaine (Senlis-le-Sec, HDF, FR)

STM Valve Cover Fittings for Evo 4/5/6/7/8/9

Alejandro Correa (Louisville, KY, US)

A++++ great product fit perfect

Michael Dillard] (Charlotte, NC, US)
Evo valve cover fittings

Great product and service. Stm is awesome!!

Leon Scott (Phoenix, AZ, US)
Works well

It fits in perfect add some epoxy to hold it in place and no issues to it.

Kory Lindsay (Easton, PA, US)
Evo valve cover refresh

These valve cover bolts got rid of the old oiled and beat up bolts that were going back on my freshly powder coated valve cover. They did the trick. I would definitely recommend them.

Cancer and Reproductive Harm