Will this work with a catback I already have installed?

This is an axelback system—it bolts directly to your factory catalytic converter, so it works standalone. If you've already got an aftermarket catback, check fitment at the connection point before ordering, as some catbacks have non-standard flanges.

Do I need to install a tune or change my fuel mapping?

An axelback system only replaces your muffler and resonator; the catalytic converter stays factory. No tune required.

What do I need to bolt this on?

Standard hand tools and a jack to safely support the vehicle. Assembly mounts at factory attachment points—no custom brackets or drilling. Refer to the installation guide for torque specs on all fasteners.