Most people bodge the tuning of a ZETEc with induction kits, exhausts and crap like that. They then go on about how you cant tune it withotu spending thousands.

The 2 most restricted area on the ZETEC in the original car is the mapping and the inlet manifold. Change those 2 first and you can then start tuning. An internally standard 2 ltr ZETEC can produce 170 bhp with twin 45 carbs or twin 40 TBs. Add cams and head work and you have 200 bhp from a light, revy, cheap and reliable engine. You just have to do it properly.