One set of 2 bolts. for Oil Trap, Breather Box, Oil Separator mounting
These original design bolts have shoulder on them. This part is designed to create positive seal and to prevent oil leaks from the oil separator mounting point down the side of the engine block.
These bolts with shoulder will fit breather box 3501160 and 1389430 found on volvo models 240 740 940 960 ,with 4 cylinder gasoline fuel injected engines. We have a solution to the problem. Install quality parts. Stop loosing oil .