Do I need to remove the factory resonator or muffler to install this?

Yes. This catback system replaces everything from the catalytic converter back — resonator, muffler, and factory tips all come off. You're bolting your new system directly to the cat outlet using the existing mounting points.

Will this system fit if I have an aftermarket cat or headers?

This bolt-on design targets the factory catalytic converter outlet. If your outlet diameter or mounting location differs from stock, verify fitment before purchase. No modifications are guaranteed to work with non-OEM cats or headers.

Does the stainless steel tip come polished, or do I need to polish it?

The tips arrive polished and ready to install. No prep work required — they're finished out of the box. Over time, road salt and brake dust will dull the shine; periodic cleaning keeps them looking new.