Mudwaa, it will be different for different cars.
You're unlikely to be able to get an Xcal2 to suit from Focussport, as the US is unlikely to have the same
ECU codes. You'll have more luck with Dreamscience in the UK.
The
ECU code is normally printed on the
ECU itself, so you'll need to locate that (I only know in LR's, not LS's, but some of the other guys will know)
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Manual 2003 Machine Silver 5 Door LR Focus Zetec.
Mods: Ford Racing CNC'd cylinder head milled .040", 3 angle valve grind. Ford Racing Stage II camshafts. Ford Racing cam gears. Ford Racing long tube header. Random Technology hi flow cat. Herrod 2.25" stainless cat-back. Pipercross Viper intake. CFM 65mm throttle body. 2000 ported intake manifold. Herrod Custom SCT tune. Eibach suspension. Quaife ATB diff. Wilwood 13" brakes. Custom ST170 leather interior.
www.cardomain.com/ride/2773918