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The Moroso GM LS valve cover breather kit features a 12AN male fitting and is designed for LS covers with a single-tab oil fill hole. It combines the AN-style threaded connection with the single-tab fill arrangement to allow a larger, serviceable breather or hose connection while matching the common LS single-tab fill layout found on many GM engines.
Moroso GM LS Valve Cover Breather Kit -12An Male Fitting - Single Tab Oil Fille Hole
