SS/XSpower has made improvements on there kits, so not all are trash, the manifold i had and neverused looked to be good.
dont jugde on other peoples experiances, IE someones SS autochrome manifold cracked, could have been from untuned and to much fuel and running too hot, most people dont use a EGT gauge with turbo setups. ive seen aftermarket cats GLOW red from untuned( we were tuning a miata on a dyno after we put a turbo kit on, the EGT gauge was like 18,000F.)