Pirate Mfg Hot Rod Black Billet Aluminum Valve Cover Breather Kit W/Grommet SBC BBC V8 Hot Rod Black Billet Aluminum Valve Cover Breather Kit W/ Grommet SBC BBC V8 This breather kit 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, Gasser or Custom Car project