'87 635; age, mileage and performance make me think it's time to the replace fuel injectors. New or rebuilt is the question? With new Bosch being about $90 each and rebuilt about $40 +/- it makes one think and ask;
Are rebuilt ones any good?
Is there a difference
What are your experiences in this area?
Which did you choose and why?
Do you recommend a a particular source?

Thanks for your thoughtful input