Clear View Filtration 201 Features:

The Chevy Block Adapters Part #200 uses three O-Rings that seal the adapter against theblock and boltsin place of the stock filter adapter. Two O-Rings create a double seal which stops oilfrom leaking outside the engine. The single inside O-Ring seals the inlet from the outlet opening. All Block Adapter have machined O-Ring grooves to keep O-Rings in place so they don’t blow out or leak. Chevy Block Adapter O-Ring Kits also include the two small O-Rings used around the Mounting Boltsto seal them from leaking. All O-Rings are made of Viton which is heat, chemical and fuel resistant.