I have a 9C1 5.7. I have the injectors cleaned when I rebuilt the TBI. I just bought a set of serviced and flow matched injectors off eBay. The seller has a 99.5 rating with thousands of sales. I was disappointed today when the injectors arrived. The P/N had been removed, but I could still read it, 34085. They are off a mid 80's Caddy 4.1. When I contacted the seller he said they disassemble the injectors and rework them for the proper application. Looking closely at both ends I can see that they actually did take them apart and restaked the ends. I had no idea that was possible.

Is anyone familiar with this process? Any idea what that would do to the longevity of the unit? Thoughts? Trust the injectors? Send them back? I am leaning towards using them, but I want to find out more about the process.

Thanks