Resontaors on the intake are usually there to -
1. reduce the level of noise emanating from the engine.
2. reduce torque peaks.
3. increase torque dips.
It has been my experience over a number of cars that the intake resonators actually do reduce both noise and horse power. (97 Nissan Sentra, 2000 Mazda 323, 1998 Mitsubishi Lancer, 1999 Honda Civic)
Unfortunately, havent removed the Mondeo's resonator due to lack of parts.
The mondeo has a poor design from the factory. While resonator removal using the elbows and piping will gain you some horsepower, a true cold air intake, eg CTA intake with GMK extension, will be the best option. This will have the best improvement in the torque curve possible from an intake.
Ziyad
