yea that's actually the default level of the original low pressure sender you would replace. Last time I looked the lowest I could find was a 0.5 and its what I run, but not bothered as I thought about it and decided that 0.25 BAR is a bit low anyway lol On cold start it will up to 6 driving and over and about 4 on cold idle, when hot it will hover at 2 - 4 driving, obviously the harder you drive the higher it goes, full throttle at 6krpm can hit over 5 and 2 or a bit lower on idle. I don't have a part number on my invoice for either the gauge or sender, but they are both vision range 10BAR VD