How much additional tire clearance do these flares provide?

The GT500 flare design extends outward to accommodate wider wheel-and-tire packages. Measure your current fender opening width and compare it to your new tire diameter and offset before installation to confirm fitment with your specific setup.

Do I need to drill holes to install these, or do they use existing mounting points?

These flares are designed to mount using factory attachment points. Verify your vehicle's OEM mounting holes align with the flare hardware locations before final installation.

What wheel offsets and sizes work with the GT500 flare profile?

The wider flare geometry accommodates deeper offsets and larger diameters than stock fenders. Cross-reference your wheel specifications (size and offset) with tire sidewall height to ensure clearance from the flare inner lip during full suspension articulation.