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K&N 57I Cold Air Induction Kit Focus ST225

£ 269.99
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K&N 57I Cold Air Induction Kit Focus ST225
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