Yep, dont chance blowing your motor, get at least 42#ers . go larger if you plan on 10#'s or more of boost.

 

go 60s first and dont waste your money

 

If you want to go all out on the injectors, the larger low impedence with a driver are actually easier to tune than a high impedence of the same size. I have not personally ran any of them, but a friend of mine in the know says my 95lbs low impedence will act like stock injectors.

 

You friend is absolutely correct.

They will definitely run better, be easier to tune than 60's, but with the right peak and hold driver you can run high-z's and the driver for the same benefits and upgrade to low-z;s if and when you need 'em.

 

My 43lb injectors are at 97% with 7lbs boost on my 6.0L Get some bigger injectors right away.