Just installed my new FSD Sinful exhaust. It was a simple install and Frankie offered any assistance, if required, along the way. Great service! Great product! They aren't any louder than my V&H 2 into 2, but the look RAWKS!
Pauldeepsea had them on his Dog and I like the look (and after some questions he kindly answered) I went for it. I was actually going to buy his, but someone beat me to it. He is correct; they are mounted to the heads and there is a connect/meeting point where the pipes bolt together...plenty secure.