The stock frame on a Polaris RZR XP 1000 was built around stock tires and stock ride height. Add big tires, a tall lift or a portal gear lift and the extra weight and leverage go straight into the chassis' weak points. This frame stiffener reinforces those spots with 4.5 mm steel plate, laying the groundwork for going big on the XP 1000 or XP 4 1000.
Highlights
- Strengthens the weak spots on the RZR's frame
- Made of 4.5 mm heavy-duty steel plating
- Provides the strength you need when adding portals, big lifts or bigger tires
- Adds support and stability for hard work and hard riding
- Powder coated for durability
Support Your Stock Frame
We're talking big tires, big lifts and big portals. The stock frame just isn't cut out for that kind of weight. The stiffener supports the stock chassis where it's weakest, so the upgrades you bolt on don't end up flexing or cracking the frame underneath them.
Go Big or Go Home
Once the weak spots are taken care of, you can add the biggest suspension upgrades you can think of. Whether you're planning monster tires, an 8" lift kit, or even a portal gear lift (or why not all three?), the frame stiffener helps make sure the RZR XP 1000 can handle the load.
Built to Last
This part has a big job, which is why it's made from 4.5 mm thick steel and powder coated for long-lasting durability. You can ride for years without seeing rust or corrosion.
What's in the Box
- Steel frame stiffener
- Installation instructions
Who It's For and What Pairs Well
This is the first part to install before a lift, portal or big tire build, and a smart add for any RZR that sees hard riding. Plan the rest of the build with RZR XP 1000 lift kits, RZR XP 1000 portal gear lifts, and stronger axles in RZR XP 1000 axles and CVs. Browse more chassis reinforcement in RZR XP 1000 chassis and frame parts or RZR XP 4 1000 frame and chassis.
Fitment
| Year | Make | Model |
|---|---|---|
| 2014-2023 | Polaris | RZR XP 1000 |
| 2014-2023 | Polaris | RZR XP 4 1000 |
Note: Not compatible with FSP-P-RZR1K or FSP-P-RZRXPT
Installation
The stiffener is not compatible with the FSP-P-RZR1K or FSP-P-RZRXPT frame stiffener plates, so don't plan to run them together. Instructions are below.
- source:
- superatv
- satv_url:
- https://www.superatv.com/polaris-rzr-xp-1000-frame-stiffener
- fitment_raw:
- Polaris RZR XP 1000 2014-2023; Polaris RZR XP 4 1000 2014-2023
- install_pdf:
- https://madmin.superatv.com/amfile/file/download/file/5981/product/89341/
- desc_status:
- rewritten_2026-10-22
