Excellent street, strip, oval track, truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 327-400 cubic inch engines. Works with most standard components. Dart's PRO1 23 Deg 180cc Platinum series heads utilize wet flow technology. Independent tests have demonstrated an average 25 horsepower gain over the original trend setting PRO1 design. These 180cc as cast heads out perform many larger heads in a wide range of applications.? Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats and hardened, radiused exhaust seats are standard. Assemblies include Stainless Steel valves, premium springs, locks, retainers, studs, guide plates and seals.
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