I should be ample for as stage 3 (330bhp) - as Damo has said the Bosch 023 is a much better pump on paper..... though I was surprised that when I had my car tuned be Mark Shead he said that the Walbro (sytec) pump was more than capable of running 400bhp and he said he really rated the pump. I had this problem of buying a walbro pump before finding out about its supposed limitations and did not really know about the bosch pumps etc.... ( I also have a 044 that I bought off ebay thinking I could use it ) But my car is running 25psi of boost and is over 330bhp and I am not worried about it.