I have a MagnaFlow 12288 and love it. Nice rumble, zero drone. I like the stock exit, so I bought just the muffler. Cut the old one off and welded the new one in myself. Only cost was the muffler... $108 shipped. Cheapest exhaust I've ever gotten.
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---------- Post added at 09:10 PM ---------- Previous post was at 08:52 PM ----------
I swapped out the factory muffler for the Magnaflow P/N 12388 performance muffler. I'm sorry I did it. The #12388 is a direct weld-in replacement for the factory muffler, and a flow-through design which the factory muffler is not. You can see right through the Magnaflow muffler from one end to the other. It is a great muffler and it has a great/deep/smooth sound, but I do not think it is an improvement over the factory muffler. I gained no power and no fuel economy, and lost the raspy tone of the factory can at WOT. There is absolutely nothing wrong with the factory exhaust system that warrants a large expenditure to replace it.
The 12388 is too much muffler, IMO. The 12288 is what I run. It's shorter and offers a little more sound. As for mileage, I've never picked up MPGs from just a muffler replacement. To get appreciable millage increase, I imagine a complete mandrel exhaust system, including headers would be necessary. That and a good high flow air filter (prolly wouldn't waste my money on a CAI...but that's a topic for another thread). But if headers and a complete exhaust are in the budget, then I'd definitely go for it, but for sound, performance and just all around awesomeness... MPGs would be a distant 4th. Now, as to which compete kit to go with? I dunno.
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