Valve Cover Holden 6 149-161-179-186-202 Red, Blue + Black Motor with 2 holes 1-1/4" for Breather and Pcv. Internal Height 74mm. Chromed Steel Baffled. Grommet Kit to suit comprising 1 Pcv and 1 Oil Cap Grommet, is our Part No 66-520. 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 . Use Reusable Valve Cover Gasket MAG186G.