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Racing Valve Seats Dart Pro 1 Port

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Super-slick ports like this high-flowing Dart Pro 1 intake port can deliver high flow throughout the lift range for two reasons. The first is obvious--port shape. The second is more subtle and comes under the heading of "seat science."
Valve Seat Power

Super-slick ports like this high-flowing Dart Pro 1 intake port can deliver high flow throughout the lift range for two reasons. The first is obvious--port shape. The second is more subtle and comes under the heading of "seat science."  View Related Article