If a part is temporarily unavailable, you could substitute it with these parts:
Quality Exhaust manifold for Mercedes G-Class G 300 CDI 184 hp Diesel
Wide selection of new exhaust manifold for Mercedes W461 G300CDI (461.333) Diesel 184 hp, priced from £273.96 to £366.72. Choose from 3 trusted manufacturers.
Manifold exhaust system for MERCEDES-BENZ G-Class models
300 GD (460,3) OM 617.931
300 GD (463.327, 463.328) OM 603.931
280 GE (460,2) M 110.994
G 300 TD (463.330, 463.331) OM 606.964
240 GD (460,3) OM 616.936
230 GE (460,2) M 102.981
350 Turbo GD (463.320, 463.321) OM 603.972
G 270 CDI (463.322, 463.323) OM 612.965
250 GD (461) OM 602.939
300 GE (463.227, 463.228) M 103.987