Ben Fenner wrote: >Does anyone know the Volumetric Efficiency of the SR20DE head? A head doesn't have volumetric efficiency. An engine does. >Also, has anyone ever had a stock head flowed professionally to see what >kind of numbers if flowed? I know of a few people who have flowed SR20 heads, but I'll let them speak up if they like. George Roffe Houston, TX http://www.nissport.com