Do I need any gaskets or fasteners to install this?

The converter itself mounts at the existing factory points. Check your van's service manual for torque specs and gasket requirements at the flange connections — those details vary by year and engine configuration.

Will this work if my original pipes are rusted or damaged?

This converter replaces the converter and Y-pipe together, so minor rust on surrounding exhaust components won't affect fit. If the mounting flanges or hangers are damaged, address those separately before installation.

Is this converter street-legal?

It's engineered as a direct OEM replacement for your specific engine. Verify your local and state emissions requirements before purchase — regulations vary by region.