Ok here is My question, I am building my twin setup and I am getting pretty close to complete, But I need to know if I should upgrade. My intercooler has two 2.5" inlets and one 3" out let. My t76's outlets are 2.5 inches, so my thought is that it would be meaningless to increase the tubbing size to anything Larger? Next from the outlet of 3" to the throttle body, would it be beneficial to go 3" to 3.5" inch before I get to throttle body?

Here is what I am working with

 

Well my turbo outlet is 2.5 also, but my intercooler is 3inch on both sides.

So i am running 3inch for all the piping.

 

i think you should be fine with 2.5 inch to the intercooler and 3inch from there.

byut i do think you should post some more picks of how you have managed to fit two 76 in there

Chris.

 

yeah i agree 2 1/2" before the intercooler will be fine . Definitely would go with 3" after

 

https://ls1tech.com/forums/showthrea...=943368&page=2

Scroll to the bottom you can see what I had to do to make 2 76's fit. It was not an easy task!