Yes the downpipe is the recalled part and would be replaced. If I were you, if you still have the stock midpipes, I'd get aftermarket ones if you are already doing the downpipes. Most don't stick with just the downpipes so you may as well get a full cat back exhaust (including midpipe) while you have the stock exhasut off. You don't "need" a retune but may gain some power with one.