Magnum High flow converters increase the engine horsepower, throughout the RPM range. HP-gain is noticeable at the wheels besides becomes exponentially larger as further modifications are made to the engine, such as cold intake, performance chip or a catback.
Torque in general, the power you feel in the seat while driving. Magnum cats increase this torque as well as the horsepower across the RPM range. As with HP, the current increase isn’t anything incredible, but the massive gains tend to improve as the rest of the car’s power output improves. Magnum High Flow Catalytic Converters do not trigger check engine light unless header installed.