Setup in sig, current turbo has a 2.5" outlet, 2.5" charge piping to a factory throttle body. As of right now, everything is matched in size. Would there be any benefit to going 3" or larger on the piping and 72mm or larger on the throttle body without changing the outlet size of the turbo?

 

NO and it will decrease turbo response as you have to now fill up a larger charge pipe. YOu want to run the smallest possible wihtout the airspeed going over a certain mach speed. there is a write-up about it but not sure what its titled. stick to 2.5"

 

this is what I was taught as well, thanks for the input.