im fitting a cat sensor tomorrow so will be interesting to see what kind of readings i get.

regarding over heating issues, once i sorted a correct temperature sensor so i now have an acurate guide to temperature (bearing in mind i have a proalloy rad as well) there is no issue a very effective rad and cooler imo.

the s1 temp sensor is different to the s2 and gives a very different reading the tuner who put my engine together put a new sensor in the engine as u would expect.i said it wasent right and even looked up the part at a local motor factors who gave me an identical part to what the tuner put in... took an old sensor off a head i had kicking around and job done, it was a male spade type sensor NOT a male bullet type.

not running crazey boost 15 psi and ive had no probs ( touch wood )