Description

S&S Cycle 90-1004

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 for your specific bore size. Natural aluminum finish. Install Instructions Download

FITMENT DISCLAIMER

Fitment information is provided as a general reference only and is not guaranteed for any motorcycle, whether stock or modified. Compatibility may vary by year, model, and individual configuration.

Customers are responsible for verifying fitment prior to purchase. House of Harley-Davidson assumes no liability for purchases made based on incorrect or unverified fitment information.

Please contact our Parts Department with any questions before ordering at 414-282-2211