FITS ALL CHEVROLET FORD AND DODGE ENGINES THAT HAVE VALVE COVERS WITH THE STANDARD 1 1/4" HOLE. YOU ARE PURCHASING A 1 1/4" PUSH IN STYLE HI-SHINE POLISHED BALL MILLED BILLET ALUMINUM ENGINE PVC BREATHER VALVE FOR VALVE COVERS MEASURE 2" TALL BY 2 1/2" ROUND AND HAVE A FLAT HI-SHINE POLISHED BILLET TOP AND HOUSING PUSH-IN TO THE HOLE ON THE VALVE COVER MADE BY RACING POWER COMPANY.