Darceyst225

I have a focus st225 on an 06 plate which has basically been turned into a focus rs. Everything is RS except for engine clocks ecu. Am looking at putting new intercooler in but not sure if it's an rs one I should put in or st? I'm also adding as air intake inlet plenum and want to put new cat back exhaust but unsure if I should put rs or st one on. It currently Def has rear rs box on but unsure if it full from cat back. What fits? The other dilemma is collins 320 map upgrade or bluefin? Any help advice would.be much appreciated

salsheikh

its an ST engine so stick to the ST intercooler as im not sure if the RS one is different. it may not be but i would check out any intercooler websites to see if the pics show any difference.
cat back exhaust - go to any decent exhaust place and hve the pipe replaced - topgear or longlife exhausts should do this easily.
for the intercooler/exhaust - check out ebay as there are always loads available.
remap - personal choice really - collins can do a bespoke map to suit the mods already on your car, bluefin will be a generic one. speak to others who hav had maps done by these two and decide.
you may want to check out the st owners forum as it will have more useful info for you
http://www.focusstoc.com/forums/