Do I need to prep the exhaust pipe before wrapping?

Clean the pipe surface with a dry cloth to remove loose debris and dust. A clean surface helps the wrap grip and stay in place long-term. No special treatment is needed.

How tight should I cinch the zip ties?

Snug enough that the wrap doesn't shift when you shake the pipe, but not so tight that you're crushing the material. Even tension as you spiral-wrap will keep it secure without kinking the wrap itself.

Will this wrap protect wiring and fuel lines near the exhaust?

Yes. This wrap absorbs and redirects radiant heat away from adjacent components. It's most effective when wrapped directly around the exhaust pipe or heat source, reducing the chance of meltdown on plastic lines and wiring harnesses nearby.