Hey! I have a Cooper S R53 Bj. 2003. With my car everything is still series and I wanted to ask how to make it sound a bit more sparkling or kernelier? I prefer the cheapest (despite the good) and legal method. 🙂 Have already thought about getting an ESD from Bastuck but this should become very loud at some point. Can you help me there? Please look forward to your answers. 🙂