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1/2" thick 1018 MS flange is for the bottom portion of the Evo 8/9 O2 housing. This is a 3" flange (factory is 2.5") for use with larger O2 housings or down-pipes designed to mate to factory location exhaust. Counter bored for a 3" donut gasket.
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🇺🇸 Ship from USA · On Agora since 2026
$45.99