Features & Benefits:
* S&S Super Stock Cylinder Head.
* Includes Lower SS90-4120 lower Rocker Gaskets
* Includes Head bolt kit SS930-0027, replaces the short H-D head bolts .
* Includes Decompression Release Block-Off Plugs SS90-4916-2
* Compression releases may be purchased separately if desired.
* Accepts S&S or OEM pistons – refer to Compression Ratio Chart for S&S Super Stock Heads for 1999-05 Big Twins for further Info.
* Accepts up to 640 lift ca ms with S&S pistons – if using stock H-D pistons, valve reliefs must be machined in the pistons due to larger valves
* 2.000in. Intake Valves & 1.605 Exhaust Valves.
Tech Tips:
* OEM H-D rocker covers can be retained when using S&S manual compression release or S&S Easy Start Cams.
* Must use the supplied SS90-4120 lower rocker gaskets when running
OEM Heads
* Heads can be decked up to .060in. to increase compression – normal clearance checks should be carrie d out.
Proudly Made in the USA by S&S Cycle !
