Exhaust bolt holes only match the ends. However, the two middle holes are a pain (PITA) and are off center. I will be doing like the review above and do some rotary work on them to get them to seat right. The casting is nice and heavy and has bulk to it which is nice. Little more work than I anticipated. Hopefully this review helps others. Ultimately, you can’t beat the price for what you get. A little rework and should be good to go.
The whole thing was a little short. Holes didn’t fit the studs. Ports were misaligned. I made it fit with a rotary file. Also there was no room for the socket wrench and nut. I worked on one with the rotary file but I miss one and had a hard time with the socket fitting Casting is real heavy cast but that’s what makes the clearance problem. I made it work it’s OK. But if you were working on a customers car you would be cussing