Is there a difference between primary and secondary fuel injectors? just wondering since i was gonna buy some

 

you should really search before posting question like this. yes 550 primary and 850 secondary. i suggest you read the stickys and FAQs at the top of the forum and use the search function.

 

lol. you can upgrade the stock ones to have greater cc or you can buy them. some of switched 850s to the primary and changed secondary to 1300 for higher hp applications.

Not to be mean but if you are asking this question, you shouldn't be messin' with injectors right now or wasting your money on something you may not even need yet. the faq will tell you all. spend the time to read and search and you'll get more respect around here. We were all newbs once so know its easy to just post and want an answer.

off the soap box

 

This was my thought as well. Unless you are really modifying several things and significantly increasing boost and/or going single turbo there is really no reason you would need to upgrade the injectors. If you are worried about yours just pull out the stockers and have them clean and flow tested.