Gasket - 5VZ Throttle Body Gasket (Paper "O" Shape)
Throttle body gaskets can be a source of hard-to-find vacuum leaks if the throttle body is removed or disrupted. Any time you remove yuour throttle body, you should replace the gasket while you're at it. On the 3.4 V6, the factory gasket is stainless steel with a large flat piece that protrudes into the intake tract, which creates a decent amount of restriction. A cheap and easy upgrade is to replace the "D" shaped gasket with an open "O"-shaped gasket to eliminate the restriction.
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