Will I need new hardware to bolt this to my catalytic converter?

Standard exhaust clamps and gaskets are all you need—your hardware store or local shop will have them. The cat-back bolts directly to your factory cat with standard fasteners.

Does this require any welding or cutting of my current exhaust?

No welding. You're removing your factory cat-back section entirely and replacing it with this one. If you still have OEM components downstream, you may need to remove them to avoid fitment conflicts.

What's the return process if it doesn't fit?

Test-fit before fully tightening everything down. Once you've bolted it in place and run the engine, you'll know if it sits right. If there's a problem, contact support with photos of the fit issue.