A person restoring a M code Dart or Barracuda would not want TTI headers if doing the car total OEM regardless of cheaper. If and I say if a guy really needs the OEM as built for their car manifolds then this is what they will seek out. I dont think TTI headers are part of the equation/ consideration to the person who wants these manifolds. But the price on these is crazy high....I guess a home run out of the park is what will win this game for the seller?