Super Stock ™ Cylinder Heads for Twin Cam for Harley-Davidson

S&S Cycle Super Stock ™ Cylinder Heads for Twin Cam for Harley-Davidson Black/Natural Super Stock ™ Twin Cam Cylinder Heads High Port Flow Gives Great Performance Now, and More Later When Additionional Upgrades Are Done Done

Heads are Fully Assembbed with Springs and Valves, and are available in silver or wrinkle black Powdercoat

Compression Ratios Vary depending on Cylinder Heads Chosen, Pistons used and Engine Displacement; See Compression Ratios Chart for Specifications

79cc Heads Work Great With Stock Motors for 88 "To 103" Motors; 89CC/91CC Heads Work Best for Motors Over 103 "OR with High-Companion Pop-Up Pistons

79CC have 1,940 "INTAKE and 1,575" EXHAUST VALVE AND SPRINGS FOR UP TO .650 "LIFT (UNLESS NOTED); 89CC/91CC HAVE 2,000" INTAKE AND 1,605 "EXHAUST AND .650" SPRINGS

79cc Heads Accept Oem Rocker Boxes

89cc Heads Accept S&S Rocker Boxes Only (Part #90-4110)

Heads Are Machined for Compression Releases (Sold Separately); S&S ROCKER BOXES REQUQUED WHEN USING S&S COMPRESSION

Do not include rocker arm components, INTAKE MANUOLD OR GASKETS

Heads Include Four Long Headbolts, and Reuse Four Long Oem Headbolts

Accept Oem INTAKE MANUOLDS

SOLD IN PAIRS

Made in the U.S.A.

Super Stock ™ Cylinder Heads for Twin Cam

Note: Must use S&S Rocker Boxes (Part #90-4110) IF S&S Compression Releases are used.