Did some checking last night, Tomco replacement number is 15510 - According to their published data 422 cm3/min - 2.7 bar (40.7 LBS/HR - 39.2 PSI) Bigger than you thought, I'm sure Take Care - Jason > Bosch 280 150 040. It's listed in the big injector list on the FTP site, > but no flow rate.