I bought used 750s, spend $10 to have them checked and flow tested at a shop.ollie said:I'm with ludes on this one..
IMO used injectors are just that USED!
I know from experience in the past injectors used up injectors can be clogged or have a poor spray pattern.
Can you use 450 DSM injectors? Yup,but if you have tuning issues don't be surprised if they need to be sent out to be serviced.
Once again IMO I'd buy a nice set of 440 or 500 RC injectors..