2001 Ford Ka Ka exhaust manifold. Help

I need to replace my exhaust manifold on my ka 2001. I recently went to a breakers yard and they had a manifold for a 2001 ford ka. Turns out it only has one lamba sensor at the top but I need one with 2? Why is this if they were made in the same year? I found one on ebay that has two sensors but the add sya J4D only, what does this mean? Is it the engine code or something? On my v5 type, variant J4P1. I'm confused as to whether it will fit my ka or not?