DynoJet Stage 4 Power Package – Polaris RZR XP Turbo / Turbo S

Name: DynoJet Polaris RZR XP Turbo Stage 4 Power Package
Brand: Dynojet
SKU: DYN-96090017
Price: 3399.99 USD
Availability: InStock

Up to +40 WHP Over Stock – Turbocharged Power Meets Trail-Proven Durability

Looking to take your Polaris RZR XP Turbo or Turbo S to the next level? The DynoJet Stage 4 Power Package delivers up to 40 additional wheel horsepower over stock, combining advanced tuning, heavy-duty clutching, and a water-cooled big turbo upgrade for explosive power and unmatched durability.

Whether you're building a desert shredder, rock crawler, or a race-ready RZR, Stage 4 is engineered to dominate all terrains—without sacrificing reliability. Perfect for serious enthusiasts who demand top-tier performance from their UTV.

What's Included in the Stage 4 Kit?

Every component in the DynoJet Stage 4 kit is designed to work in perfect harmony for peak power output and drivetrain reliability:

Power Vision 3 EFI Tuner – Pre-loaded with DynoJet’s custom performance maps for your exact model
DynoJet Clutch Kit – Optimized for sand, rock, and mud conditions to maximize belt life and power delivery
Silicone Charge Tube – Heat-resistant and high-flow, ideal for boosted setups
Water-Cooled Big Turbocharger Upgrade – Up to 27 PSI of boost, 17% more airflow, faster spool times
DynoJet Wastegate Actuator – Precisely calibrated for reliable boost control and smoother power curves

Turbocharged Horsepower Gains

The Stage 4 water-cooled turbo system provides a substantial upgrade over stock:

Boost pressure increases up to 27 PSI
Charge temperatures significantly reduced for consistent power under load
Turbocharger delivers 17% more airflow with reduced lag
Achieve up to 38% more power on 2016 models with the correct tune

This package isn’t just about peak horsepower—it’s about maintaining performance when you need it most.

Engineered for Demanding Riders

The included clutch kit ensures the rest of your drivetrain can handle the upgraded power without hesitation. Whether you're pushing through deep sand, scaling slick rocks, or ripping muddy trails, the DynoJet clutch system provides:

Smooth engagement and responsive throttle feel
Optimized RPM range to keep you in the powerband
Reduced belt slip and lower clutch temperatures

Key Performance Highlights

Up to +40 WHP gain over stock (with tuning)
Boost pressure up to 27 PSI
Water-cooled turbo dramatically reduces charge temps
17% more airflow for better spool and stronger top-end
Heavy-duty clutching system designed for all terrains
Upgradeable to Stage 5 – built for scalable performance as your build progresses

Exact Fitment Compatibility

This Stage 4 kit is compatible with the following Polaris RZR models:

Polaris RZR XP 4 Turbo EPS – 2017, 2018, 2019
Polaris RZR XP 4 Turbo EPS DYNAMIX Edition – 2018, 2019
Polaris RZR XP 4 Turbo EPS Fox Edition – 2018
Polaris RZR XP 4 Turbo EPS LE – 2019
Polaris RZR XP 4 Turbo S – 2019, 2020
Polaris RZR XP Turbo EPS – 2017, 2018, 2019
Polaris RZR XP Turbo EPS DYNAMIX Edition – 2018, 2019
Polaris RZR XP Turbo EPS Fox Edition – 2018
Polaris RZR XP Turbo EPS LE – 2019
Polaris RZR XP Turbo S – 2018, 2019, 2020
Polaris RZR XP 4 Turbo – 2019, 2020
Polaris RZR XP 4 Turbo S Velocity – 2020
Polaris RZR XP Turbo – 2020
Polaris RZR XP Turbo S Velocity – 2020

Important Note: Not legal for sale or use in California on any pollution-controlled motor vehicle.

Real Customer Reviews

Derek M.
"My 2018 Turbo S RZR hits HARD with Stage 4. Turbo spools like lightning and temps stay cool even in the dunes. Worth every penny."

Nicole A.
"This was a big upgrade but wow… game changer. My XP 4 Turbo pulls like a freight train now. Install was solid and support from SideBySideSports was awesome."

Why Choose DynoJet?

DynoJet’s Power Packages are track-tested and trail-proven, giving your UTV the power it needs without sacrificing longevity. Every kit is built to scale—start with Stage 4, then advance to Stage 5 when you're ready for even more. No wasted parts, no backtracking—just raw, buildable horsepower.