I have a PSI motorsport box for Defender td5 mk1 for sale (
http://www.psi-motorsport.com/turbodiesel/fiche-e.php?selectid=136&lg=en). It was taken out of my 110 a month ago. They really do make a difference. Anybody interested before I put it on ebay? No fitting manual (as it was installed by a previous owner), but they're easy to fit. I'm looking for around ?100.