Do I need new gaskets and fasteners to install this?

Yes. Use OEM gaskets and bolts specific to your vehicle — do not reuse old fasteners. Your service manual will specify the correct torque specs for reassembly.

Can I bolt this on without removing anything else?

Access depends on your engine bay layout. You may need to remove heat shields or other components to reach all mounting points — plan for 2–4 hours if this is your first time. A lift or jack makes the job easier.

Will this work with my factory cat and muffler?

This header is designed as a direct bolt-on, but downstream fitment with your existing exhaust depends on flange spacing and collector diameter. Test-fit the connection points before final installation to confirm alignment.