Do these flares require drilling into my existing body?

No. These are designed to bolt to your existing factory anchor points. Verify your vehicle's original fastener locations before installation to confirm alignment with the fender mounting structure.

What should I do to prep the panels before painting?

Sand and prep the surface per your chosen primer and paint system's guidelines. Since these ship raw FRP, you're starting with a clean base — just ensure proper surface scuff and any edge sealing before your final finish.

Will these affect my tire clearance?

The GTC profile is engineered for mild extension over the wheel opening. Verify fitment with your current wheel size and offset; if you're running wider or offset wheels, check physical clearance before final fastening.