Will these headers fit without modifying my engine bay?

These mount at factory exhaust ports, so no engine bay fabrication is needed. You may need to check clearance with your specific intake or air intake setup before final install.

Do I need a new exhaust system to use these headers?

The headers bolt to your factory ports and connect to your existing exhaust system at the collector. If your current pipe diameter matches the header outlet, you're good. Otherwise, you'll want to match or step up to the appropriate exhaust piping.

Can I install these myself with basic tools?

Factory port bolt-ons are straightforward — you'll need standard hand tools and jack support. Give yourself a few hours and take photos as you disconnect the original exhaust. Work when the engine is cold.