Here's a picture of a 335 I "borrowed" from one of our member's websites. (I hope that wasn't violating a norm.) This Capri does not have this extension.
Now here's two pictures of Capris currently being offered on eBay. The first is a 335, the second is a 345 and both have this extension tail piece.
Could someone explain to me the difference between the two (technically why would a person choose one over the other) and if both types are factory? Thanks.



