I am planning on Magnaflow mufflers when I get around to re-doing my exhaust. A couple of guys I know have recently switched from the chambered Flowmaster type muffler to Magnaflow mufflers, and the general consensus is that they sound better both inside and out. One was a '57 Bel-Air and the other was just a stock '05 Silverado. I have ridden in both vehicles, before and after, and I personally love the sound they have now.