Cold pipe size
Cold pipe size Hi I have a 2004 gto ls1 motor in my old chevy .I am almost finished with the build of a twin turbo system.I am to the point of running the cold pipes and dont know what size to run.Any advise please?Thanks Dan
use whatever you can fit. i personally have 3.5" from my turbo to the intercooler (3.5" is the discharge size on my turbo) and then i used 4" from the IC to the throttle body. i just chopped off my IC inlet/outlets and bored it out to the sizes i wanted. (since my core is 4" i was able to fit a 4" outlet on it!)
