The Cosworth inlet's design is superb. The one thing allowed to affect the power curve is the cam timing. If one doesn't like the curves just alter the timing for high rpm or mid range. The exhaust and the inlet has to have as much flow as possible. These runners are too long and will make the car slower. The Peugeot 306 has an inlet of similar design to the Cosworth and if someone is going to design an aftermarket inlet take a look at that.