Subaru wrx sti fuel injectors 550cc

These have feed a 4 to 450hp? rex with no probs. Pump couldn't keep up in the end. These are in really good condition and will more than save your motor from detonation. along with a simple twin rail conversion. these particular injectors are 550cc. 440cc will give a maximum 200kw or 290hp, 500cc will gave a maximum 220kw or 295hp. these came off my car dyno tuned to 260kw or 349hp at the motor where the VF22 turbo could not keep up. after putting a huge turbo on, giving a big hp increase - 400 to 450hp they where still going strong. these are the type R revised yellow top injectors. very hard to come by. I am now wanting to 5 to 550hp and these will not do the job.