Brand New Black Ball Milled billet aluminum PCV Valve and Valve Cover Breather Kit With Grommets. This breather and PCV will fit all 1-1/4 Inch valve cover openings. Will not fit factory valve covers with 3/4 Inch openings. Included grommets reduce to accept 7/8 Inch stem. These breathers easily come apart for cleaning. Perfect for your Rat Rod, Hot Rod, Muscle Car, or Custom Car project.