Do I need the entire wide body kit for these to work?

Yes. These fenders are designed as part of the complete wide body package. Installing them alone will leave gaps and misalignment with the rest of your bodywork. Verify you have the full kit before ordering.

What prep work do the fenders need before installation?

Sand and prep the mounting surfaces on your existing fenders, then lightly sand the back side of the over fenders where they'll contact the vehicle. Clean both surfaces before bolting in place. If you plan to paint them, sand the outer surface first and apply your chosen primer and finish.

Are fasteners and brackets included?

The fenders come as bare panels. You'll need to source hardware suitable for FRP attachment—most builders use stainless bolts, washers, and corresponding hardware based on their mounting approach. Verify your wide body kit documentation for recommended fastener specs.