S&S rocker covers fit all 1984-' 99 Harley-Davidson big twin engines and 1986-'03 Sportster models, regardless of year and whether the engine vents through the crankcase or cylinder heads. OEM-style "umbrella" fittings are included with billet rocker boxes for 1991-'03 Sportster models and 1993-'99 big twin engines with cylinder head venting. Chrome finish. S&S Part #: 90-4050