I'm looking to replace my current header and muffler on my 2012 WR450. The OEM muffler has split and is in rought shape. The OEM header isn't that great too, it has been pressed up against the engine and has a good kink in it. Besides the normal dings. I'm thinking of getting an FMF Q4 Hex S/A muffler and the FMF powerbomb header. What do people think of this setup? I'll look for some sort of protection for the header. I had no quarels with the stock muffler and header, but OEM prices are way too expensive.