Description 20v 4age Silvertop – Oil pump New and genuine Aisin oil pump for intended for a 20V 4age Silvertop. Sold as is or with the additional options. All of these include the gaskets for the oil pickup, pump to engine block as well as the front main seal. WARNING! There are some non genuine pumps advertised on Ebay as “high flow”, these actually have narrower gears than the original and hence flow less. There is also the question of their quality. Custom options – Oil pressure up kit: A simple kit to raise the regulated oil pressure rating of the pump. Suggested for anyone holding the engine in the upper end of the rev range, running an engine oil cooler or running a higher than original RPM limit. Pre-fitted for free to a pump when purchased together. – Ported: The oil pump is taken apart, the harsh steps carefully taken down into radius corners, cleaned, gears pre-packed with grease to prime on first start and then reassembled with high tensile internal hex bolts instead of the original problematic JIC (looks like Philips) head type. NOTE ON TIMEFRAME: Due to the time consuming nature of this modification it may take up to a week before a pump with this option is dispatched. – TODA upgrade gear set: For when things get serious this gear set is a must. As a rough guide this is for engines that reach 9000 revs and beyond. At this point the original sintered metal gears are prone to snap and the TODA replacement made from Cro-Mo steel keeps on going. Pre-fitted for free to a pump when purchased at the same time.
