4″ Flat Screw-On Filter Assembly
P # 405-115 & 405-115-B

Clear View Filtration’s Patented Dual Oil Filter Assemblies are the Best Oil Filtration System on the market. When using the See Through Filter and an additional filter on the bottom, the user is able to filter the same particles as a disposable would but with the added ease of being able to monitor the engine without taking or cutting anything part.

The 4” Screw-On Filter Series (both Part #400’s & Part #405’s) of Filters can be used on most Big and Small Block Engine combinations, including Street, Dirt and Marine use. This filter is the best choice for motorsports ran on dirt and other applications where the user wants to filter microscopic and dust particles out of the oil system. Oil flows through the See Through Filter which is equipped with a coarse 115 micron element which traps all the larger particles that can be viewed and inspected while the microscopic particles flow into and get filtered out by the System 1 or Disposable Filter screwed onto the bottom. A shot of air empties the filter in seconds exposing the element and filtered particles without draining or leaking any oil and without unbolting or loosening any fasteners or fittings.

These 4” Screw-On Filters (Part # 405) were designed to use a System 1 or a disposable filter on the bottom. Part # 405 has a flat sealing surface on the bottom so a System 1 O-Ring seal can seal correctly. Early finned style System 1 filters which use 2 O-Rings can only use the outside O-Ring to seal. The inside one can not be used. Recommend using the Billet Pro Series System 1 which uses a single larger O-Ring seal. Also need to purchase from System 1 a Chevy Threaded bushing to thread onto the bottom the See Through Filter.