Exactly...a lot of those Spark/SSAutochrome/OBX etc manifolds use thin material, and crack easily. The weight of the turbo is too much...they must be braced.

Drag offers a lifetime warranty on their manifolds, not sure about RevHard. Again, if youre piecing together your own Revhard or Drag kit, and not using any upgraded components, you may as well purchase a used or new kit and save yourself the hassle. You wont end up saving that much money if at all by piecing them together, and IMO, its not worth the headache.