How much tire clearance do these flares add?

The 4.8is arch profile extends outward to accommodate wider wheel and tire packages. Verify your current tire sidewall height and wheel offset against the new flare geometry before installation to ensure adequate clearance at full suspension compression.

Do I need to drill or modify the body to install these?

These panels are designed to mount using existing body attachment points. Reference your vehicle's service manual and test-fit each section before permanently fastening to confirm alignment with factory holes and seams.

What wheel offsets and sizes are compatible?

The flares accommodate the wider stance of 4.8is performance setups. Consult your wheel and tire specifications, then physically mock up the fitment or reference tuning forums for your platform to confirm offset and diameter compatibility with these panels.