I'm in the process of building my own twin turbo kit for my LS1 Z28
M6. I'm using (2) stock 1G turbos w/ internal wastegates off an eclipse and two side mounted intercoolers. I have all the fuel system upgrades so that's taken care of. I'm going to be using the stock manifolds because they're strong enough to hold up the turbos under heat. I'm going to be using 3'' piping (like the type that imports use as intakes) for all the turbo to intercooler to intake plumbing. The flanges have been chopped off the manifolds and replaced with custom matching sets for the turbos. Oil will be feed to the turbos via (2) scavenging pumps. I'm hoping to make at least 450rwhp with this kit stock, and once i add a new forged internal engine w/ 6.0L heads and upgraded turbos (like the T-34's) i'm hoping for 600rwhp+.

Does this sound like a good setup to you guys? Please correct me if something feels wrong or out of place. I have the turbos and intercoolers. $300 for everything. I also have a friend who is a professional welder and he can do all the welding and bending of the pipes. ANY HELP WILL BE GREATLY APPRECIATED.