Turbo =/= Header.
That is all.
Are you saying that a turbo is not(does not equal) an exhaust manifold? Or that it does not need one? If it's the first, I don't get why you posted, I didn't read anyone say that. If the second, lots of companies make turbo exhaust manifolds for the sr20. You're post baffles me(that'd probably be a pun if we were further back in the exhaust system).