Will these work with my stock wheels or do I need custom offsets?

Extended lugs work with both stock and custom wheels. You'll want wheels that clear the extra length — most aftermarket setups do. Stock wheels with deep center caps may contact the nut head; test-fit before final installation.

How tight should I torque these?

Refer to your vehicle's service manual for the proper torque spec for your lug pattern. The lock nut design prevents loosening once seated at spec, but the fastening force remains the same as OEM.

Do I need to clean or prep these before installing?

The gun metal finish ships ready to install. Wipe down with a clean cloth to remove any dust, then mount directly to your hubs. No additional finishing needed.