Do I need new gaskets or clamps to install this?

Gaskets and clamps are not confirmed as included with this system. Pick up a new exhaust gasket and stainless band clamps before installation to ensure a clean seal at the catalytic converter connection.

Does this come with mounting hardware?

The assembly uses factory mounting points, but specific hardware confirmation isn't listed. Inspect your stock hangers before install — you may reuse them or grab new ones from your local parts counter as backup.

Will this system fit if my cat has been replaced?

As long as your catalytic converter outlet matches the stock flange size and location, this catback bolts on the same way. Confirm your cat's outlet diameter and flange type before ordering.