SF-1020 flow bench. this has the optional temperature and pressure monitoring and correction factors built in. Also it will register 1240 cfm at 28" H2O - I was told by the late great Harold Bettes that it had been modified to be able to perform such tests and measurements. I built my own version of the head slider, longer, wider and more substantial for flowing heavy Diesel heads, I have a few custom bore sleeves, you will need to machine some more for better coverage of the bore sizes that you work with. This bench will test at high depressions and of course resulting high velocities to test flow path development for engineering level work. This bench is in very good condition, It is in my home shop and hasn't gotten much use in the last few years. I have another standard 1020 at my engine shop for typical flow testing. Cash or PayPal, BUT I must receive the exact price without PP charges. My zip is 97862, require pickup at my location, we can discuss shipping, but I prefer that the buyer pays cash and takes it in a pickup or on a flat open trailer. Otherwise shipping would require additional charges for me to palletize and build a protective cover.