Ok, you want the BEST?? The BEST is always to remove the exhaust. But I know that's annoying. You dont want attention right? Stock exhaust...but wait...doesnt create any power...so...hmmm what can you do here?

Keep your stock exhaust, new header, no cat with a cut out or e-cut out for quick easy HP. Still low key from the cops and it is sleeper status.

-Ant.