A CURT receiver extender adds rearward clearance; an anti-rattle clamp stabilizes a shank already fitted in the receiver. These parts do different jobs. Compare receiver opening, shank construction, extension reach and retention method before selecting a product.
What problem are you trying to solve?
Receiver extender
Moves the accessory rearward. Confirm tongue weight and manufacturer restrictions.
External anti-rattle clamp
Tightens receiver-to-shank clearance but never replaces the secured receiver pin.
Internal bracket and pin
CURT 22323 works only inside a compatible hollow two-inch shank.
Simplified conceptual illustrations, not scaled installation drawings.
Extension capacity and retention matter. An extension moves the load farther from the vehicle and can reduce the permitted tongue weight. The upper outlet on CURT 45792 is for accessories only, never for trailer towing. A clamp is not a hitch pin.
CURT extension and anti-rattle comparison chart
| Part | Receiver fit | Design | Main use / restriction |
|---|---|---|---|
| 45791 | 2-inch | 8-inch solid-shank receiver extender | 3,500 lb GTW / 350 lb tongue weight; verify any reduction in hitch capacity |
| 45792 | 2-inch | 8-inch dual receiver extender | Lower receiver: 3,500 lb GTW / 350 lb TW; upper receiver is accessories-only, never for towing |
| 22320 | 2½-inch | No-tool anti-rattle clamp | External lever clamp for compatible solid or hollow shanks; still requires secured pin |
| 22325 | 2-inch | No-tool anti-rattle clamp | External lever clamp for compatible solid or hollow shanks; still requires secured pin |
| 22323 | 2-inch hollow shank | Threaded anti-rattle pin and internal bracket | Requires hollow 2-inch accessory shank and ⅝-inch pin hole; unsuitable for solid shanks |
| 45367 | 2-inch | Wrench-tightened anti-rattle clamp | External two-nut clamp; usable with compatible solid or hollow shank; pin required |
Five checks before ordering
- Measure the receiver opening and the accessory shank; 2-inch and 2½-inch clamps are not interchangeable.
- For extenders, check the required rear clearance, the hitch manufacturer's extension instructions and the lowest system rating.
- Never use the upper outlet of CURT 45792 to tow; only its properly rated lower outlet is a towing connection.
- Choose external clamps 22325 or 45367 for appropriate 2-inch applications or 22320 for the 2½-inch application.
- Only use the internal 22323 bracket with a compatible hollow 2-inch shank and ⅝-inch pin hole; retain the hitch according to CURT instructions.
Shop exact CURT receiver parts
Each card links to its exact NewRVParts product and online availability.
Receiver extensions
CURT 45791 — 8-inch solid-shank receiver extender3,500 lb GTW / 350 lb tongue weight; verify any reduction in hitch capacityView product and availability
CURT 45792 — 8-inch dual receiver extenderLower receiver: 3,500 lb GTW / 350 lb TW; upper receiver is accessories-only, never for towingView product and availability
External anti-rattle clamps
CURT 22320 — No-tool anti-rattle clampExternal lever clamp for compatible solid or hollow shanks; still requires secured pinView product and availability
CURT 22325 — No-tool anti-rattle clampExternal lever clamp for compatible solid or hollow shanks; still requires secured pinView product and availability
CURT 45367 — Wrench-tightened anti-rattle clampExternal two-nut clamp; usable with compatible solid or hollow shank; pin requiredView product and availability
Hollow-shank threaded bracket
CURT 22323 — Threaded anti-rattle pin and internal bracketRequires hollow 2-inch accessory shank and ⅝-inch pin hole; unsuitable for solid shanksView product and availability
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