The Nightrun Garage 4age Aisin oil pump is the best replacement oil pump for you 4age powered car. This oil pump is the newest and most updated design and replaces the older, more fragile oil pumps. The Aisin 4age oil pump works on 16 valve 4age engines with either the 3 rib or 7 rib blocks. This 4age oil pump has the thicker 9.5mm gear which provides approximately 22% more oil volume over the original. Our Aisin oil pump comes complete with a stamped metal steel pump-to-block gasket, oil sump pickup gasket, and front main seal.