Turn downs would be great ,nice and noisy echoing underneath the car letting everyone know you are coming... But if you have emissions where you live they might get a little upset about your lack of easily accessible tailpipe to hook up the sniffer and fail you I know they do that where I live in Arizona... But hey if you don't have emissions go for it man! Also MAC sells a turndown kit so you won't have to got to a muffler shop...