I`m still unclear on this, can the 197 exhaust manifold be modified to fit the 172 ? I have looked and the bolt arrangement at the gasket end looks to be the same. I have been offered one for £150 and another guy is selling a 182 one for £210, i will have both modified to fit either way to my existing exhaust system. But i thought if the 197 bolts upto the cylinder head and the lambda sensor connection is the same.. i might aswell go for that?. I`ve tried to negotiate with the guy selling the 182 as he is closer and point out someone else is offering the 197 for like £60 cheaper, but i think hes set on his price.