S&S S&S, Shovel cylinder head kit. 3-5/8″ bore. Natural

Description

S&SS&S, Shovel cylinder head kit. 3-5/8″ bore. Natural  512372

fits  66-78 Big Twin with o-ring style heads & big bore cylinders (NU)

Natural aluminum finish. O-ring 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″.

 

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