Re: Single exhaust and cats
Back in 2015, when I put my truck together('80 C10, 5.3L/4L60E), I made a y-pipe for it, using mandrel bend kits that are available. Piping from the flanges is 2 1/2" into a 3" Y collector, then into a 3" exhaust pipe. For a muffler, I, too, didn't want an obnoxiously loud piece, so I chose a Walker QuietFlow SS unit, with a 3" tailpipe exiting behind the right rear tire, pretty much in a stock location. Sounds pretty good, without being overly loud
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