I know alot of your guys here have exhaust systems with straight thorugh mufflers, well I was wondering which is the best way to install it, if its unmarked? Mine doesn't say which side is the inlet, so I was wondeing if I should install it with the louver openings inside toward the front of the truck, or the back. I installed it with them to the back because I thought they would be restrictive. What did you guys do with yours?

You can install it anyway you want. Typically they are installed with the louvers toward the front, to help with the noise. It will work fine the way you have it, it basically works just like a straight pipe. You will get more turbop noise as well. If you like it leave it. If it is too loud then turn it around!

A mufflerhttp://www.dieselplace.com/forum/smileys/Ermm.gif,,,,,,,,,,Do we need one of those? I think it fell off the same time as the cathttp://www.dieselplace.com/forum/smileys/Big Smile.gif. Both could be considered as
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Well, when I ordered my exhaust system they offered two kits. One with a muffler, and one without. I ordered the one without, and of course they sent me the one with the muffler.