Polaris RZR Pro XP 4 Seater Portal Gear Lift Spring Kit Upgrade

Portal gear lift spring upgrade for your 4 Seater Polaris RZR Pro XP.

Configure an All Thingz UTV portal gear lift spring upgrade for your 4 Seater Polaris RZR Pro XP. For a machine equipped with an aftermarket portal gear lift. Include the portal brand, lift size, tire size, shock package, and other suspension modifications when ordering so the spring package can be matched to the build. All Thingz UTV manufactures the springs in this kit.

What this kit offers

• Setup for your modified machine: Spring-package options for the suspension configuration identified above.
• Keep your shock assemblies: This is a spring upgrade; replacement shocks are not included.
• Choose the package you need: Review the contents below before selecting a full or partial kit.

Vehicle fitment

Before ordering: Match the complete model name, seat count, and installed shocks. Double-check your selected spring color and package. Provide your model year, usual passenger/cargo load, and suspension modifications with your order.

What’s included

Select the spring color and exact package in the options. This listing supplies springs, not portal gearboxes or a portal installation kit.

Setup for your modified machine

Portal lift and spring preload perform different jobs. Match the spring package to the portal lift size, suspension geometry, shocks and operating load; do not use spring preload alone to duplicate the lift supplied by the portals.

Choosing your spring package

The full kit includes eight springs: upper and lower springs for all four shocks. The six-spring option includes four front springs and two rear tender springs, retaining the rear main springs. Front Uppers & Lowers includes two front upper and two front lower springs. Rear Uppers & Lowers includes two rear upper and two rear lower springs.

How the spring stack works

While both stacked springs are free to compress, their combined rate is lower than either spring alone. On a setup using a crossover stop, the divider reaching that stop changes which spring can continue to compress. The lower main spring then provides the firmer stage. Spring selection and crossover setup both matter; replacing springs does not change the shock’s internal damping.

Installation overview and setup

Follow the Polaris service procedure for your exact model year and the instructions for your installed shocks and aftermarket suspension or portal kit. Professional installation is recommended. The video below is a general spring-installation overview.

1. Record the starting ride height on level ground and note the vehicle's normal operating load.
2. Safely raise and support the vehicle. Unload the suspension before preload adjustments and release spring tension with suitable equipment before removing retainers.
3. Install the springs supplied in your selected package using the applicable front and rear shock procedures. Torque removed fasteners to your exact model's specifications.
4. Lower the vehicle and move it forward and backward to settle the suspension before remeasuring.
5. Follow the shock manufacturer's adjustment limits. Make small changes with the suspension unloaded, then settle and remeasure. Keep left and right settings matched on each axle.

For settings specific to your kit and vehicle configuration, contact All Thingz UTV.

All Thingz UTV ride-height baseline

These are the original ATU front/rear reference figures published with this kit. They are not verified finished-height targets for every modified machine. Portal lift size, suspension geometry, tires, and load can change the appropriate target; confirm your build-specific settings with All Thingz UTV.

Measurement reference: Use the measurement points specified in the instructions for your suspension configuration; keep the same points when comparing before and after measurements. Tire dimensions, pressure, passengers, accessories, and suspension setup affect the result. Listed tire sizes do not confirm tire fitment.

Spring installation video

General installation overview: This video demonstrates spring installation concepts. Hardware, procedures, and adjustments can differ by model year, shock package, and aftermarket suspension configuration. The demonstration vehicle is a Polaris Pro XP Dynamix. Use the instructions for your exact setup.

Related spring-kit options

These links help you compare spring packages or find a different vehicle configuration. They are alternative applications, not a list of required add-ons. Match the complete model, seating and shock details on the destination page.

• Polaris RZR Pro XP 2 Seater Portal Gear Lift Spring Kit Upgrade
• Polaris RZR Pro XP 2 Seater Tender Spring Kit (Fox Shocks)
• Polaris RZR Pro XP 4 Seater Tender Spring Kit (Fox Shocks)
• Polaris RZR Pro XP 4 Seater Tender Spring Kit (Walker Evans Shocks)