Spectre's Extraflow push-in breather in blue fits valve covers with a 1¼" breather hole and pairs a triple chrome-plated top and base with a 2" tall blue synthetic filter element. Measuring roughly 2¾" overall, it includes a grommet for quick installation and is built for universal fit. Note that California legality is restricted for racing vehicles; verify CARB status for your application.
Spectre ExtraFlow Push-In Breather Filter - Blue