K&N Induction Kit (Gen2 - 57i-2503)
The Focus ST has a very poor stock air induction system.
We have been tuning this kit with K & N on our own ST Focus demo car and have seen results of over 14bhp
This new Quality air induction kit from K&N the makers of the world’s best air filters delivers the tuning promises ! and at much cheaper cost.
The Full restrictive air box is removed and replaced with a new Air box and intake trunk.
The weather proof ECU is relocated to the front of the air box to keep the flow of air and cooling adequate.
More power - 100% quality - 100% easy fit