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Only difference in the 172 exhausts is the cat (early phase 1 has 1 lambda and slightly longer mid sections, later phase 1 + phase 2 has 2 lambda sensors) from what I have found is that all the exhaust are the same may just have to move the exhaust about to make it sit nicely.
Only difference in the 172 exhausts is the cat (early phase 1 has 1 lambda and slightly longer mid sections, later phase 1 + phase 2 has 2 lambda sensors) from what I have found is that all the exhaust are the same may just have to move the exhaust about to make it sit nicely.