Size:This valve cover air breather size is 4"*2.25"*2", polished aluminum PCV valve cover breather with finned design. Application:Air Breather Combo Valve Cover Suitable 1" Pipe of 1-1/4" Valve Cover Holes - Set of 2 Oval Air Breather Kit 6008 Polished Aluminum Smooth 3/4in PCV Valve Cover Breather For 350 1-1/4 Inch Valve Cover Holes The 1-inch tube is designed to fit standard 1.25-inch valve cover holes perfectly. We include two rubber grommets in the package to ensure a secure, tight fit that prevents annoying air leaks Size:This valve cover air breather size is 4*2., 25*2, polished aluminum PCV valve cover breather with finned design. Chevy 350 454 Black Aluminum Smooth Valve Cover Breather & Mini PCV Easy to install: Aluminum air breather valve cover can be quickly completed installation, and it is easy to use, saving you time and effort.