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boostedinaz is right, those are some pretty shitty welds, the thing looks like it was hacked together. You can get away with welding that isn't that good on pieces that don't see a lot of heat, IC pipes, intake pipes etc, but when a bad weld is heated up real good (like 1500*F from exhaust gasses) it will crack and break real easy. The part that gives away a bad weld job is all of the slag that is on the rest of the part (slag= all the little bits of weld that are scattered around) from my experiance slag like that only comes from welding something thick and not having enough power for good penetration, instead of traveling through the metal it simply beads off. This probably occured because the turbo and DP flanges are pretty thick and require a high setting to get a good weld, the problem is that trying to weld something very thick to something very thin (exhaust pipe) usually results in blowing through the thinner metal. The person who did the welds is obviously a novice/beginner and he/she turned down the power so as not to blow throught the exhaust pipe. The welding can be done, don't get me wrong but it requires a bit more finess rather than point and squeeze mig welding. My advice would be to stay away from it, you can get a way better o2 mani for about the same price with much better quality.
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