Short answer: No
Long answer: Nnnnnnnnnnnnnnnooooooooooooooooooooooooooooooo....
You can file the holes oblong enough to fit the bolts, but it will never sit twice the same way, and the ports are both too small and wrongly spaced. When I bought my car it had the turbo installation done this way, and getting rid of the BPT-based exhaust was the first thing to do. The ports for cyl #1 and #4 only had about 10x20mm of passage, all the rest was blasted against the flange. So no, don't do it, go for the extra mile and do the exhaust properly.
Long answer: Nnnnnnnnnnnnnnnooooooooooooooooooooooooooooooo....
You can file the holes oblong enough to fit the bolts, but it will never sit twice the same way, and the ports are both too small and wrongly spaced. When I bought my car it had the turbo installation done this way, and getting rid of the BPT-based exhaust was the first thing to do. The ports for cyl #1 and #4 only had about 10x20mm of passage, all the rest was blasted against the flange. So no, don't do it, go for the extra mile and do the exhaust properly.