Natural aluminum finish. Band-type style. Stock style; 3-5/8 big bore cylinder heads from S&S for 66-84 Shovelhead models. S&S heads are designed as stock replacement. Still; where stock heads flow about 124 cfm @ 10"; S&S heads do improve these figures somewhat and typically flow around 135 cfm @ 10". Heads come assembled with valves; springs; collars; valve guide seals; rocker cover and exhaust mount hardware etc. (excl. rocker arms and covers) and complete with cylinder head; rocker cover and exhaust gaskets. These heads are ready to run and will accept camshafts with a lift of up to .590".