Have you seen my post for B&B exhaust?

Yes I did, but after some search in the web wasn’t too happy about the reviews this B&B exhaust got. I did not find anything nice written about BillyBoat exhausts.
Have you driven with this?

Really! I haven’t actually seen any reviews. I have driven with it and covered around 1000 miles over a few years. I have now purchased a straight through exhaust with no cats or silencers as I’m putting much larger turbos on. I’ve run the B&B with my a28/60’s for this 1000 miles and it works great running circa 650 hp. The new setup will be around 900hp so this exhaust will not flow enough. Adam

Well I’m curious which kind of sound it gives. The drone level between 2-3K especially.

I don’t notice anything annoying, it’s not too loud unless you floor it.