As long as they are high impedence you are ok with the stock ecm. I checked my injector duty cycle with Directscan and it said they are at 95%. I have 009's (42.5lb). I asked Eric and he said if I want to turn up the boost I should get larger injectors. I'm at 21 psi boost now. I have a set of 60 pounders on order. Ebay has 15% off buy it now items if you want to buy them on ebay like I did. Check out Full Throttle's ebay site.