[ob_1jr]

if you run a straight exhaust you will throw codes unless you get the EGR blocker plate and finger stick or boost stick. I have a LB7, so I don't know a whole lot about this, but check these threads out:
Boost Stick

EGR Blocker Plate

I am getting ready to cut my muffler out and go straight pipe, but I have no experience with aftermarket exhaust. Just remember, you don't have to go with a name brand exhaust to have a good one. Most of the time they just empty your pockets when you could have spent less. I'm not going to point out name brands, I will let you figure some of that out by yourself.