Hello, I hope I'm posting in the right section and this might be a obvious question.

I drive a 2011 6.7 3500 with 125k miles and its deleted.

My stock holset VGT turbo has gone out and I need to replace it. I've looked into 2nd gen swaps but its not something I'm wanting to go for at the moment. (Just trying to get my truck back).

That being said I was recommended the s300 replacement kit that lets me drop the new turbo right in without manifold or anything.

I'm replacing it with a 64.5/.90 size turbo that's supposed to be close to the same Set up as the stock turbo.

My question is, when I replace the old turbo with this s300 turbo, do I absolutely need tunes right out the gate or am I safely able to drive it without causing any damage before I get tunes?

The truck has an H&S tuner that doesn't work anymore. Outside of that I don't know what's been done.


I hope I didn't miss any key info and thanks a ton for any help.

-Nate