I'm mark i own a frozen white Focus RS mk2 with the cp400 tune and i use all the Spec-R cooling upgrades on my car. I had the cp400 tune on my car with other manufactures components fitted but once i fitted all the Spec-R equipment the car come to life as the air temps are now spot on.
I have all the spec-R goodies fitted to my RS. my RS has got the spec-R intercooler with big hard boost pipe kit and the spec-R oil cooler with thermostat. Spec-R header tank and steering reservoir. Spec-R cross over pipe. I'm more than happy with how my RS now looks and performs.
Once you install spec-R on to you vehicle you wont look elswhere.
Thanks to pete and his guys at Spec-R