The only downside of wrapped headers is that you CAN'T see the blood-red glow when they're hot - I kinda liked that! Following a slow tractor one dark night, about 2700rpm and not fast enough in 2nd gear to have much air cooling effect got the pipes a perfect crimson, like post-feed fangs on a friendly vampire....!
Alas no more, but they really shouldn't do that unless going flat-chuff in a hot dyno cell.
