yea to the temp sensor but i dont know if mine is naffed or not...
N75 is the valve that basicly controlls the boost, the cupra and the R have n75 F valves, the J came from the audi S2 and the H is from the RS4, im running the H on the R, i had the J on my cupra, J on the cupra will give it a little more boost, about 2psi and hold it for a little longer BUT some time will kick it in to a soft limp mode...
i put a J on the R, it boosted to about 24psi, good times but dropped and held only 10-12psi, bad times
the H im runningboosts to about where it did on the oem F but it wont drop a singel psi till i change gear, good times BUT it is only boosting to around 20psi on a stage 1 map??? my cupra boosted more...