Valve Covers Alloy Chevrolet V8 Small Block 283-400 Finned Tall Black Baffled-pr. Valve Covers Chevrolet Small Block V8 283-400 Motor with 1 hole 1-1/4 for Breather or Pcv. 3-11/16 Tall Height will suit most Roller Rockers. Black Finned Aluminium Baffled. Grommet for Pcv is Part No 41900 and for Oil Cap our Part No 41901. Most Oil Caps with 1 Neck will fit such as our Part No’s 66-012 and 66-013. Dome Style or 66-001, 66-002, 66-003, 66-044 Pleated Filter Style. Can use Reusable Valve Cover Gasket MAG350G. Please do not hesitate to send us a message if you have any queries/questions. We know that buyers would want to receive their orders, as quickly as possible. We carefully pack all orders, to ensure that it reaches our buyers, in good condition. For any other issues or concerns, kindly send us a message so we could work things out.