RZR XP 4 1000/Turbo Stage 1 Dual Rate Spring Kit (Fox IBP) by ZBroz Racing

Transform your factory Fox IBP shocks into a true dual-rate setup with race-inspired performance. The ZBroz XP 4 1000/Turbo Stage 1 dual rate spring kit Fox IBP includes progressive tender springs, main springs, and adjustable billet crossover rings — converting single-rate factory springs into a tunable dual-rate system. Gain 2" of lift, improved comfort, high-speed control, roll stability, and bottoming resistance. Tuned for the 4-seat XP 4 1000/Turbo chassis weight.

Key Features

• Converts single-rate to dual-rate via tender + main + crossover ring system
• Gain 2" of lift with full kit installation
• Adjustable billet crossover rings — tune your crossover point
• Progressive tender springs — soft initial stroke for small-bump comfort
• Main springs matched to chassis weight
• High-tensile silicone chrome wire springs
• Direct fit on OEM Fox IBP shocks
• Tuned for 4-seat XP 4 1000/Turbo
• Improves comfort, control, stability, and bottoming resistance
• Made in the USA

Specifications

• Type: Dual-rate spring kit with crossover rings (Stage 1)
• Includes: (2) Front Progressive Tender Springs, (2) Front Main Springs, (2) Front Crossover Rings, (2) Rear Tender Springs, (2) Rear Main Springs, (2) Rear Crossover Rings
• Shock compatibility: OEM Polaris Fox IBP Shock
• Lift: 2"
• Application: 4-seat Polaris RZR XP 4 1000/Turbo with Fox IBP factory shocks

Fitment

This XP 4 1000/Turbo Fox IBP springs kit fits the 4-seat Polaris RZR XP 4 1000/Turbo equipped with OEM Fox IBP shocks. Verify your factory shock type before ordering.

Frequently Asked Questions

What does dual-rate do that single-rate doesn't?

A dual rate spring kit uses two spring rates — soft initial for small-bump comfort and progressive higher rate for big hits. Crossover ring lets you tune where the rate transition happens.

What does this kit include?

The XP 4 1000/Turbo dual rate spring kit with crossover rings includes (2) front tender, (2) front main, (2) front crossover, (2) rear tender, (2) rear main, (2) rear crossover — complete dual-rate conversion.

Will it fit other shock types?

No — this kit is matched to Fox IBP dimensions specifically. Different OEM shocks (Fox IBP, Fox Live Valve, Walker Evans Needle, W.E. Velocity, etc.) have different spring lengths and seat configurations.

How much lift will I gain?

You'll typically gain 2" of lift with this kit, plus dramatically improved ride quality.

Is installation difficult?

Easy DIY install with included instructions. Plan 2-3 hours per side. Professional install is recommended for those new to spring work.

Why ZBroz Racing

ZBroz spring kits use tested and proven designs with premium high-tensile silicone chrome wire. The Polaris RZR XP 4 1000/Turbo dual rate springs for Fox IBP shocks upgrade has been refined over multiple racing seasons. As a Stage 1 spring upgrade for XP 4 1000/Turbo Fox IBP, this delivers measurable ride quality at a fraction of new shock cost. The off-road Polaris RZR XP 4 1000/Turbo Fox IBP spring upgrade serious owners run. The smart UTV dual rate springs and RZR XP 4 1000/Turbo springs path. This XP 4 1000/Turbo spring kit delivers full dual-rate conversion in one package.

Order Yours Today

Upgrade your ride with race-bred dual-rate springs. Add the ZBroz XP 4 1000/Turbo Stage 1 dual rate spring kit (Fox IBP) to your order. Shop/Order from Dunes 2 Dezert SXS.