Dart SHP Special High Performance dual plane intake manifolds flow more air than comparable intakes. They feature long, separated runners for bottom-end and midrange power, plus a special runner design and larger plenum to flow the air needed for high-rpm horsepower. Designed to mount single, square-bore 4-barrels and make power from idle all the way to 6,000 rpm, Dart SHP dual plane intake manifolds are the perfect choice for your street/strip vehicle.