I'm going to change my opinion on Prospeed. I had one, a stealth system. You can see the back box as it is so deep, it sounded crap compared to the ktec stealth and cost me a fortune and I don't really think I paid for quality.
You would need to get a quote from him to be fair, but I paid £465...mention CS and he will sort you out.around how much are systems for a 182 from charlie at prospeed?