Hello guys, for first I would excuse my self because I’m writing in English, but my writing in German is not perfect so I don’t want to make a mess. Before 4 months ago I have bent Volvo C70 D5a Summum 2007 (180PS) inclusively complete external Heico Exterior pack with four pipe exhaust system + diffuser.http://www.heicosportiv.de/mainframe.asp?lang=en&e1=371 Is it normal that sound with this exhaust system in connection with D5 engine is only an make-up (sound of exhaust system is crap = no sound at all) or my Volvo garage have made some mistake? On Heico site it is written that it has been built for T5 and D5 engines. I have searched on net about this topic butther is nothing write about it. For example sound on D5 engine and Donsilencioso exhaust system is amazing.http://www.youtube.com/watch?v=VfpYgy8cYi8 Do you have any tips how exhaust sound could be improved and if this is normal? If I upgrade engine unit with Heico or kit to 205PS would it help? Thanks in advance Alex