Not sure on the downsides to the headlamps yet. Time will tell. That said I rarely drive the car unless it’s daytime and the sun is out
The exhaust is made up of a cat back stainless that takes the two outputs from the cats and feed them into a back box at the rear left with a single outlet at the back you see in the pic. There is a second tail pipe that comes back out the back box facing forward and that it routed under the car to appear on the right.
It is quieter then the stock by a little which suits me. If I did it again I would be more direct with the exhaust fitters and have two runs from the cat going to two smaller back boxes one each side. I’m happy with it though. Went to a place in Basingstoke that use a well known industry std stainless (forgotten the name right now though)
Dave