1. Remove downpipe (see «Downpipe replacement»).
2. Remove the thermal screen of the collector (see «Removal and installation of thermal screens»).
3. Turn out two bolts of fastening of a katkollektor to a supporting arm.
4. Turn away nine nuts of fastening of a katkollektor to a head of the block of cylinders...
NOTE: This is how the nuts for attaching the katkol lecturer are located.
5.... and remove the collector.
6. Remove the gasket from the cylinder head studs.
WARNING: The sealing gasket of the collector must be replaced with a new one each time the connection is disassembled, since a strongly compressed gasket will not provide a reliable seal.
7. If you are replacing a manifold and the new manifold does not have an oxygen sensor, unscrew it from the removed manifold and install it on the new assembly.
8. Install the collector and its gasket in the reverse order of removal.