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got an 03 and has 4inch turbo back exhaust and s and b intake and dp tuner and wanted to know what size injector I can go up to safely and was thinking on doing the fuel system kit from swamps diesel performance
for sure want to delete the fuel bowl but is the regulated return kit a potential gain or just a waste of money and if I go bigger injectors what else should be done to support it
What are your goals? Regulated return is a good investment. If your going stage 2 injectors or bigger, I'd suggest building the tranny first. That's the threshold where things start to break.
You will of course need the chip reburned for the new injectors.