Fabspeed Test pipes

Hi Everyone

Man I just installed the fabspeed test pipes on my 1998 355, for some reason they are not fitting properly,unless I am doing something wrong which is very likely. After installing everything I notice that the straight pipe that connects to the muffler is short by about half an inch. I have tubi exhaust on mine. I have attached a photo, you can see the silver test pipe is just short of attaching itself to the flange. Have any of you experienced this.
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I have another picture
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Yup both side are short by the exact same distance.

 

Should I first line up the muffler with new test pipes then install the y pipe. I did that originally and then I needed to disconnect the muffet again because the y pipe would not fit. So then I decided to install the Y pipe first while the muffler bolts were off. then I installed the by pass valve while keeping all my bolts snug, then I went underneath the car to install pipes and it actually looks to be off about an inch. I used the old flange from the original cats on the test pipes. I titan them as tight as possible and the bolts are loose. I think it because they just don't go back far enough to catch any lip to make goof contact. Unless I am doing something wrong in my sequence. Honestly to be out an inch is pretty non fitting.

 

I am hoping I can call fabspeed tomorrow and get some installation tips. As long as I don't have a faulty pipe, i should get it to work

 

I clearly understood from fabspeed that the 355 test pipe will fit Tubi Exhaust. I will need to call them today. I would be surprised if they sent me a part that does not fit my car.