These S&S® Super Stock® cylinder heads for 1984-’99 HD® Evolution® Big Twin engines feature a specially shaped combustion chamber and require special pistons that must be purchased separately. (Not compatible with stock style flat topped pistons) Large 2.000″ intake and 1.605″ exhaust valves and high flowing ports supply plenty of air for big inch engines. Compatible with cams with lifts up to .650″. Compatible with stock 3-1/2″ or 3-5/8″ bore engines. Order appropriate gasket kits separately fo r your specific bore size. Natural aluminum finish.
Fitment Notes:
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1. Works with 3.5″ and 3-5/8″ Cylinders
2. Requires SS92-1062 Pistons
3. Requires SS16-1628 manifold when using an E series carb & stock height cyls.
4. Requires SS16-1736 manifold when using CV or Mikuni carb & stock height cyls.
MFR PART No: 90-1004
ROLLIES PART No: SS90-1004
