Do I need to remove anything before installing this?

You'll be removing the factory exhaust from the catalytic converter back. Supports and heat shields may need to be unbolted for clearance during install. Have basic hand tools ready and give yourself a couple hours if you're going DIY.

Will this cause any check engine light issues?

Catback exhausts don't touch the O2 sensors or fuel management, so no codes should trigger. If your vehicle is heavily tuned or has emissions modifications, test-fit first to confirm fitment at all mounting points.

What if the system doesn't fit exactly as expected?

Stainless steel is slightly malleable if final tweaks are needed—minor adjustments at connection points or supports can be made without damaging the system. Verify all factory mounting locations line up before bolting down permanently.