S&S Cycle 106-6059 S&S Cycle Performance Cylinder Heads for Evolution Big Twin - Natural Aluminum Finish

Demon’s Part # 0930-0154 Mfg. Part # 106-6059


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Heads are fully assembled and include stainless 1.900in. intake valves, 1.575in. exhaust valves and high-lift (.585in. ) springs. For use with stock-style flat-top pistons. High compression 76cc chambers. Port design increases flow, while maintaining velocity. Stock diameter ports accept OEM-style intake manifolds and exhaust. EFI compatible. Sold in pairs. Made in the u. s. a.