Do THIS to prevent a blown up engine! #cylinder4 #rodknock @torquesolutions #subaru #coolingmod #jdm

Do THIS to prevent a blown up engine! #cylinder4 #rodknock @torquesolutions #subaru #coolingmod #jdm
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@TDT0188 says:

Be sure to buy the original Getadomtune cylinder 4 mod and support the original. Increases coolant flow through the back of the head to help prevent detonation.

@benjaminfisheriv9340 says:

What’s the thread size on that plug

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