Earl's Stat-O-Seal - 0.875 in ID - Rubber O-Ring (Pair) 26-NSO-N 570'' exhaust valves these heads

570'' exhaust valves these heads move massive amounts of air

Measurements: 18"W x 25

increased flow

This line was designed to optimize low and mid-lift airflow

Earl's Stat-O-Seal - 0.875 in ID - Rubber O-Ring (Pair) 26-NSO-N 570'' exhaust valves these headsThe Stat O Seal is very simply the best sealing washer available. It consists of a synthetic rubber "O" ring mechanically locked to the I. D. of an aluminum washer. When tightened the "O" ring is compressed, forcing the sealing surfaces around the bolt shank. They will form a positive seal over a temperature range of 85? to +450? F. They provide the advantages of an "O" ring type seal without the necessity of machining "O" ring grooves into the part.