S&S Cycle Shorty Super Carburetor Kits 66-E78 Shovelhead with O-Ring Manifold Smaller than the &amp;lsquoG&amp;rsquo its 1-7/8" bore creates higher air velocity which results in better low and mid-range response and power Recommended for engines with displacement up to 100 cu. in. Accepts stock late model throttle cables on all Big Twin models Kits include everything needed for installation on your Shovelhead with O-ring heads including the manifold and air cleaner For models with longer strokes a custom intake manifold may be required