Do I need new gaskets and fasteners to install this?

You'll need gaskets for the inlet and outlet flanges if your old ones are damaged. Fasteners are reusable if they're in good condition — pull them off the old converter and reuse them on the new one. Pick up fresh gasket material to be safe.

Can I install this myself?

Yes, this is a bolt-on job with basic hand tools. You'll need jack stands, a socket set, and maybe a penetrating oil if fasteners are stuck. No welding, no special equipment. Plan for about an hour if the exhaust isn't seized up.

Will this clear a aftermarket exhaust system?

Test-fit before you commit — aftermarket exhaust layouts vary. The converter itself mounts at factory points, but downstream piping configuration depends on what you're running. Check clearance with your full system before bolting everything down.