Trick Flow’s Track Heat high-rise single plane intake manifolds for big block Mopar are designed for engines that operate in the 3,000-7,000 plus RPM range. The one-piece spider-type design uses extended, high flow runners and a raised plenum floor to significantly increase horsepower and torque. Other important features include A319 aluminum construction, integral bosses for nitrous nozzles, and extra material for custom port work. These intake manifolds work with all square bore-style carburetors. Basic Operating Range: 3,000-7,000. Intake Manifold Height: 5.750"