I bought both the manifold and the T-4 turbo, .67AR and put it on my Supra. I was surprised with the quality as was everyone that worked on my car. We are putting down 492 RWHP & 475 ft lbs of torque on pump gas @ 16 psi of boost. She has been on the road for several months driven daily with no problems with welds and the turbo is functioning as expected. Overall, this was the best bang per buck I could find and the quality appears to be as good as much more expensive units. Waiting for the ball bearing units to arrive. They now need to make a wastegate that fits the manifold as I had to buy a Greddy that cost more than the manifold and turbo combined.