These are a couple photos of the header I made for this turbo project. I bought the header flange (part# 130022338) to bolt to the head and the mandrel bent 1.5" tubing (part# 175630305) from Stahl Headers. The T3 turbine inlet flange (part# 30263) was purchased through Turbonetics. The header is wrapped with header insulation to reduce heat loss. After several months of driving however, the header developed a leak. I removed it and found that the metal under the heat wrap had overheated to the point where the pressure inside blew a hole in it. The metal had begun to flake off under extreme heat. The parts of the header that were not wrapped were OK. After repairing the damage, I painted the header and reinstalled it. I found out later that most header makers void all warranties if header wrap is used. I can't feel any difference driving the car with or without the wrap.
Prior to paint and wrap. The front 2 cylinders go into a single pipe. #3 goes up, makes a 170 bend, then points directly into the turbo. #4 is extremely short and makes a 90 degree bend. The header flange is welded to the turbine flange. The turbo sits at a 25 degree angle to the head.
Painted with 1500F paint and wrapped with special header wrap. Don't ever use header wrap on a turbo header!!!