Replacement Stainless Steel 10micron 200mm Fuel Filter insert for Nuke Performance AN-8 / AN-10 200mm Fuel Filters. This is a Nuke Performance unique product, we always recommend you to use original Nuke Performance spare parts and this is the only filter insert that can be mounted in our 200mm Performance Fuel Filter. Two pc O-ring is included with the filter insert, this is all you need to change the filter in our Fuel Filters. The internal spring is not needed to replace when changing filter inserts. We recommend that the filter insert is cleaned / replaced at least once per season to maintain maximum function. This is far more important when using alcoholic fuel such as ethanol and methanol.