how modified is your car? if its not heavily modified a bluefin will probably do it.
here is the stats :

Ford Focus

1998 - 2005
Engine type : Non-Turbo Petrol
Engine size : 1596 cm3
Cylinders : 4
Original bhp : 99
Original nm : 145
BHP increase : 9
NM gain : 12
Lb/Ft gain : 9
price : £295