I purchased a complete stainless steel exhaust system from Waldron’s for my F-85 Cutlass including the cross-over pipe. I ordered the single inlet – dual outlet muffler and tail pipes intended for the Jetfire. I believe the turbo muffler is a little more free-flowing but it is not too loud for my non-turbo car. Just a nice burble, nothing annoying. Everything fit perfect and I’m very happy with their service. Also, I bought a complete system for my 1962 Rambnler Classic and it fit perfectly as well.