STS are nice but you want to use stock manifolds without cats with an STS, not long tubes. Holding heat in is the best way to spool a turbo, but long tubes loose heat in the length of tubing. Also by having the turbo as close to the engine as possible it improves spool time dramatically.
http://www.ls1tech.com/forums/forced...47-newbie.html
just some good info in that post.