s&s® cylinder heads for 4 bore s&s engines cylinder heads for s&s 4 bore v-series ... and spseries engines were designed for use with special s&s ... harley-davidson® evolution® big twin engines or evolution engines in sportster® ... ratio in the large displacement engines s&s 4 bore cylinder heads feature a ... heads for 4 bore 1984-up s&s big twin engines are machined for the s&s compression ... builder to incorporate either the s&s manual or electric compression release ... super stock® cylinder head kits for s&s engines for 1984 99 big twins consist of two ...
2008 50th ann iversary s&s® electric or manual compression releases for 1984 06 big ... twin engines with s&s cylinder heads get something ... kits to build big inch high compression engines now we are offering an effective ... large displacement high compression engines can sometimes be difficult to start ... stock® heads for 4 and 4 1/8 bore engines for 1984-99 big twins s&s heads for ... for stock harley-davidson® twin cam 88® engines may be special ordered with compression ... for s&s heads for evolution® big twin engines with stock or 3 5/8 bore or for any s& ... s heads for sportster® models in most cases s&s compression ... msrp $94.95 55-1010 compression release assembly msrp $124.95 90-4914 50-1080 order ...