my spicer dealer took me for a tour of his shop. thousands of driveshafts being repaired and balanced. awesome. he explained that the coated cap version was produced for a while when they were unsure if there was going to be galvanic issues. he said there isnt any meaningful % that have issues snd so dana stopped manufacturing that part. no biggie. he said install these with confidence. so i did! the picture above is what you need for all ujoints in the c4. cheers.