The bottom rear silencer is a nice, quiet Prodrive silencer that was supplied as part of the Subaru approved PPP. The top back box with a tiny silencer is a Cobrasport, much noisier and sounds great, personally I wouldn't have wanted it any noisier though. People have fitted the RCM team Ice system and then usually regretted it within days. Your current system is probably a lot louder than you think.
