I have a question for all you folks and i need some help. I still have my stock injectors and was wondering if i should upgrade. i have modified my baby and was thinking this should be a step soon but i dont know much about this subject. Do i need a tuner which will let my stang know the change or is that unneccasry. Also if i do what size should i get and how much do they effect gas miliage. Any help would be great and what brand is the best. Sorry for the spelling i just woke up and my brain is still not on. I have added superchips, k and n cold air, spacer and manafold back exhaust. Thankyou all

 

Unless you added a S/C then you don't need to replace the injectors. The stock ones should be good till around 375-400rwhp.