dutra manifolds vs header

Exhaust really depends on what you are after. As a reliable street driver, or a race car, or something in between. Budget plays a big part. For a street car, Dutra duals would probably be best, with a common pipe to the turbo. That will be pretty pricey. For a race car, headers to the turbo, again fairly pricey, custom work. For a street car at low(er) boost levels, a "J" pipe off a good quality stock type manifold works fine. One important thing to remember, and I never see it mentioned. Support the turbo. Don't expect the exhaust plumbing to do the job. Also don't skimp on the exhaust out of the turbo. Back pressure is not your friend.