Repl. O Rings

The Peterson Fluid Replacement O-Ring (Part Number 09-0020) is a precision rubber seal component engineered for Peterson oil filter block-off applications. This individual o-ring serves as a critical replacement part for maintaining proper sealing integrity in high-performance cooling and filtration systems where pressure retention and leak-free operation are essential.

O-rings in filter block-off assemblies must withstand sustained oil pressure and temperature cycling without degradation. The Peterson 09-0020 replacement o-ring is manufactured from durable elastomer material formulated to maintain dimensional stability and sealing force across typical engine operating conditions. When a block-off system develops a slow seep or weeps at connection points, a worn o-ring is often the root cause—replacing the seal alone can restore system integrity without requiring complete assembly replacement.

This replacement o-ring is ideal for engine builders, restoration specialists, and performance technicians maintaining Peterson fluid systems on race engines, classic vehicles, and high-output street machines. Carrying spare seals on hand prevents extended downtime when minor leaks appear during track events or during seasonal engine commissioning. The compact package weight of 0.02 lbs makes it practical to stock multiple replacements in a shop or mobile service kit.

Peterson Fluid Systems specializes in auxiliary cooling and filtration components for motorsports and performance engine applications. The 09-0020 o-ring is a factory-original replacement part that ensures compatibility with Peterson block-off assemblies and maintains OEM sealing performance. Individual o-ring sales are more cost-effective than replacing entire block-off kits when only the seal requires renewal.