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strip performance, towing upgrade with mildly modified engines from idle to 5,500 RPM. Best for 305-383 cubic inch engines. Dart Iron Eagle S/S 23 Deg 170cc late model and Vortec style heads produce great throttle response and low to mid-range torque for street performance engines. Our precision cast ports and chambers produce outstanding air flow without time consuming porting. Dart S/S heads are legal in many racing sanctions with Iron head rules. Assemblies include Stainless Steel valves, premium springs, locks, retainers and seals. Heads are sold individually
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