I don't mean to hijack your thread mate, but I am going down the same path at the moment. Decisions, decisions, decisions. I have bought the 5" venom high flow cat as it was on a special as part of the group buy. I also bought it as it was stated that the cat was a bolt on to the standard exhaust and dump. This should see us through to 300-320rwkw. I do not have any plans to change the dump pipe. I am also looking at getting the id1000 injectors as the tuner prefers there. The other item on the list is the process west stage 2 intercooler. I am tempted to purchase an xcal3 second hand to save some coin, but I know that we need to make sure that it is in married from the car. Anything else to look out for?