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Originally Posted by jack03frontier
I wondering how my truck would sound if I only replaced the stock muffler with a Flowermaster? And also what series would sound the best? I'm just trying to upgrade little by little
The truck is a 03 Frontier C/C 4x4 with a 3.3 auto
Any input would be helpful. Thanks

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Well, I put a Flowmaster 40 series on my 2.4L, which probably doesn't help you much. At 3K or higher it makes some noise, but the muffler is pretty far from the cab and at 2.5K (which is what I'm cruising at on the highway), I don't even notice it. Actually, with the windows up, it's not very noticeable at all. Windows down and starting from a stop, it's a good bit noiser than stock, but still not loud at all. I had a pair of MagnaFlows on a 350 Chevy that sounded nice & mellow. I "test listened" to those versus Flowmasters and on the 350 the Flowmasters were just too loud for me. If you're going to have a shop do the install, you may want to ask if they will let you test listen to the mufflers they carry.