If you take a Raptor where rocks can reach the rocker panels, get frame-mounted rock sliders — not the cosmetic running boards that bolt to the body. The distinction is the whole point: a real slider ties into the frame and can take the truck's weight when it lands on a rock, protecting the expensive aluminum body. A nerf bar or factory-style step will crumple and let the rock into the rocker. Spend on frame mounting or don't bother; the in-between is wasted money.
Rocker panel protection is one of the clearer good-versus-bad-money decisions on a Raptor build. The rockers are the lowest body line between the wheels, directly in the path of rocks and ledges, and on a 2017+ truck they're aluminum — expensive to repair. The market sells two very different things that look similar, and buying the wrong one is a common, costly mistake.
A true rock slider bolts to the frame rails — the structural backbone of the truck. When the truck slides off a ledge or sets down on a rock, the slider transfers that load into the frame, not the body. A good one can take the full weight of the truck as a pivot point. That's the job.
A running board, nerf bar, or factory-style side step bolts to the body or pinch weld. It's a step to help people climb in, and it's fine for that. Put it against a rock under load and it folds, and worse, it can transfer the impact into the body it's bolted to. For a trail Raptor, a body-mounted step is not protection — it's a liability dressed up as armor.
The verdict is direct: if rocks reach your rockers, buy frame-mounted sliders. If you only ever see sand and high-speed desert and never touch a rock with the sides of the truck, you may not need sliders at all — and that's an honest "you probably don't need this." Don't buy the cosmetic version expecting protection.
The decisions that matter:
A bolt-on frame-mount kit needs a floor jack and stands, metric sockets, a torque wrench, and often a drill if the kit requires opening frame holes. Anti-galvanic hardware matters here — steel sliders bolting near aluminum body need isolation to prevent the galvanic corrosion covered in [Raptor Aluminum Panel Repair and Corrosion](/db/?v=raptor). Anti-seize on the frame bolts saves you later.
The mistake that wastes the most money is buying a body-mounted step expecting it to protect the truck — it won't, and it can make a rock strike worse by feeding the load into the body. The second is under-torquing or skipping the re-torque; sliders take impact loads that loosen hardware, and a slider that's worked loose can shift or fail when you need it. The third is bolting steel sliders against bare aluminum without isolation, which starts galvanic corrosion at the mounting points. Safety note: a slider rated as a jack point or recovery point is only as good as its frame mounting — confirm the rating before you trust it with the truck's weight.
Quality frame-mounted bolt-on sliders run $700–$1,200 a pair from makers like ADD, CBI, or RPG; weld-on fabricator sliders can run more. Isolation hardware is $15–$25. A bedliner refinish to protect the steel is $40–$80. Cosmetic body steps are cheaper, but for a trail truck they're the wrong purchase — spend the money once on frame mounts. Pair with [Raptor Skid Plates](/db/?v=raptor) for full underbody protection.
| Part | Vendor | Est. price |
|---|---|---|
| Frame-mounted rock sliders (pair) | ADD / CBI / RPG | ~$900 |
| Bolt-on slider hardware kit (grade 8) | included / aftermarket | ~$40 |
| Anti-galvanic isolation hardware | aftermarket | ~$18 |
| Bedliner coating (slider refinish) | Raptor Liner / Herculiner | ~$60 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.