Fits fairly snugly on the idle valve fitting but works very well. This mod is for the non-vvti 1UZFE engine with a standalone ECU and a completely redesigned intake so the stock hose that normally goes to the intake pipe was gone and I didn't want to weld a connector just for the IACV. This filter is a perfect match for the IACV air intake, cold idle will only fit with the filter on the end of this valve.
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