REVTECH ROLLER ROCKER ARM SET. FITS HARLEY EVO BIG TWIN & TWIN CAM MODELS 1984-UP , SPORTSTER MODELS 1986-2003 1.6:1 RATIO (SET OF 4)
Source: Custom Chrome
These rocker arms extend cylinder head service life giving you more miles between teardowns, reduced friction and more power. The rolling action virtually elim-inates side thrust when opening and closing the valves, minimizing the wear on your engines valve stems, guides and seals. Concealed push-rod seats are induction-hardened to 58-60 Rockwell C for scuff resistance and long-term durability. Com-pu-ter-designed bodies are extra-thick and made of 4140 investment cast chromemoly steel that has been normalized to HRC35 for strength and toughness. Concealed oilways between the pushrod seats and the rollers provide reliable lubrication. Rollers are precision-machined from ball race-quality steel before being hardened and ground with a super-finished bore before being fitted to a heat-treated roller pin. Shaft bushings are steel backed and bronze laminated for extreme wear resistance. Set of 4.