This product is a set of hydraulic lifters and rocker arms designed for BMW 1 and 3 Series with N43B20 and N43B16 petrol engines. The manufacturer part number is 7542421. These components are crucial for the functioning of the valvetrain in the engine, ensuring smooth operation and optimal performance. Two of the rockers have some rust which have been polished off please they will work ok but not in perfect condition
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