610 'performance chips' for less than £9 quid!!! Cut the wire from the air sensor, stick one of them in the gap, it'll drop the voltage from the sensor so the ECU will think theres lots of air, and up the fuel level. Which will provide no extra power as more fuel needs more air, which isn't there all your doing is overfueling. Don't worry though the O2 sensor in the exhaust will pickup on this and scale back the fueling. So the end result will be you being £4.50 and 1/2 an hour worse, with a chopped up loom, it's a con-job don't bother