Hello guys! How are you? It has been a long time since my last visit here, I know and I'm sorry. Studies and work the reason. I'm George from Greece, to remind you a little bit. During this time I got a c20ne from a Calibra installed to my '82 4d Ascona, I like it a lot. It is also a liitle bit lowered, and got some Astra GSi wheels. Some photos: http://www.facebook.com/photo.php?fbid=2104353607871&l=5ebfac4122 http://www.facebook.com/photo.php?fbid=2104353047857&l=b247373319 http://www.facebook.com/photo.php?fbid=2839087775766&l=4c159a68f5 I currently use the standard exhaust system, so I would like to know the diameter the pipes should have. I'm thinking of 55mm