[ThreeQuarter]

I was looking for exactly what you are looking for: factory quiet exhaust all the way through the rev range. Last winter I took mine into a quality shop with some experience with older vehicles. They pulled out the original bend card (I think is what they called it) and made me a single exhaust using factory specs as a guide (I asked for a couple of exceptions). They installed a Quiet-FlowSS muffler and I am very happy with it. The owner of the shop said this is what would go on an eighties pickup as a stock replacement. They stocked it, so maybe your local shop might, too. Model number is 21910 / 9 006

With 2.5” pipe upstream and a 2.25” tailpipe, it’s actually a little deeper sound than I thought it would be. Now that I have all my sound deadener in the cab I’m very pleased.