thx alot, i "googled" for that info a few weeks ago and found nothing...
as for the sports exhausts for diesel engines: here in belgium are VAG diesels with bigger turbos/injectors/intercoolers and so on... 1,9 tdi's with over 200 hp and they use exhausts from
http://www.millteksport.com
the company is from england... as for now they have nothing for hondas... but if a few people are interested and email them... perhaps they make a free flowing ex. system for the civic.