Do I need to remove anything to install this?

You'll need to disconnect your existing exhaust from the catalytic converter rearward and unbolt the stock system from its mounting brackets. The catback bolts directly to your cat, so no modifications to the engine bay or undercarriage are required.

Will this system require any welding or cutting?

No welding or cutting needed. This is a bolt-on catback design that uses factory mounting locations and your existing cat connection point.

Does this come with gaskets or O-rings for the cat connection?

Confirm gasket and O-ring inclusion before installation. You may need to source these separately to ensure a leak-free seal at the catalytic converter flange.