Racetronix Injectors - any good?

[Matt B]

After long research what type of Injectors are in m Z I finally stumbled across those https://www.racetronix.biz/p/205-lb-...ondary/01d044x

Considering the amount of rust they show I wonder about the overall quality.
Any experience?

My engine runs good but not great. Bit rough idle and some other minor things that might or might not be related to injectors.

I think they were installed by a GM dealership a long time ago but have not seen more then 10000 miles since than, probably less.

Any opinions? 20210724_190605.jpg