the best 440-1 flows 400 cfm and the best B1(not the TS) flows 470 cfm. Its true you have to use the B1 intake...but its about the best single four intake anyway. price wise they are about the same for the "package" ...Indy is about $3500 and you can get the B1 deal for around $3200 in the winter special. That said, if you want the biggest valve B1/MC it will cost another $900 for the Ti valves.