Having just noticed the area this is posted in, I presume it's a big turbo Escort Cos ?

If so then I would imagine you'll be looking for a set of 400's (light blues) or 403's (greys) along with a 500 cooler if hitting the track, although std IC/CC combo prob Ok for road use. Oh, a decent live map by someone who knows what they are doing too wouldn't hurt !

Look out for the clutch & 3rd gear though !