As you said, Mirko, The silicone hose are really resistant, and doesn't have the same look either, It's really wanted parts for those who drifts, do rally , have turbo engine etc.. At least in France ! Most of people who buy a new engine, will probably fit their old hoses, and if one hose break, will replace it by another used hose etc.. This solution is only for people who want new hoses, but something more resistant, and cheaper than at BMW Usually it's for high performance engine, But it can be used on a stock engine also, some people also buy it for the look, because there are a lot of color possibilities, Like blue, red, yellow, orange etc.. I chose black for the first order because of discretion and " stock " look that most people prefer .. I'm sorry it won't fit a M20b27 Every hose that you can see under your hood are include in the set ( 7 total ) Also, the hose are made of 4 layers, as you can see in this picture : http://img801.imageshack.us/img801/5927/y65f.jpg Here is the model of the hose, I will add some picture when I will have the silicone one .. http://img215.imageshack.us/img215/6940/img0211kz.jpg