Complete S&S engines for Panhead and Shovelhead models are equipped with special billet tappet guides designed to use S&S tappets for 1984-’99 Big Twins. The late style tappet has a larger roller diameter than stock tappets. Therefore, in order to achieve correct valve timing, special cams must be used in these engines, or in any Panhead or Shovelhead engine equipped with S&S billet tappet guides. When choosing a late style cam for this type of engine, be aware that the total valve lift will be reduced, due to the smaller rocker ratio of stock Panhead & Shovelhead rocker arms. S&S cylinder heads for Panheads and Shovels can accommodate cams with up to .590” actual valve lift. The cams listed below are the generator versions of regular cams for 1984-’99 Big Twin engines. They are used in S&S complete P & SH series generator style engines and are required for any 1966-‘69 Shovel engine equipped with S&S hydraulic tappet update kits.
- for S&S P- and SH-Series Generator Engines
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