Pro R vs. Pro R Boost
Posted by Jason M on Sep 22nd 2026
Polaris just put 275 horsepower in a production RZR. The 2027 RZR Pro R Boost adds a turbo to the 2.0L ProStar Fury, starts at $49,999, and starts shipping to dealers in November 2026. That's 50 hp more than the outgoing Pro R, in a car that's one second quicker to 50 mph. More power means bigger hits, faster landings and more load through every tube and heim joint on the car. Here's what the Boost changes, and what we'd put on one.
Pro R vs. Pro R Boost: The Numbers
| Spec | RZR Pro R (outgoing) | 2027 RZR Pro R Boost |
|---|---|---|
| Engine | 2.0L ProStar Fury, naturally aspirated | 2.0L ProStar Fury, Garrett turbo |
| Horsepower | 225 hp | 275 hp @ 7,000 rpm |
| Torque | — | 223 lb-ft @ 6,000 rpm |
| Driven clutch | 293 mm | 330 mm, heavy-duty belt |
| Width | 74" | 74" |
| Dry weight (2-seat Ultimate) | — | 2,531 lbs |
| Starting MSRP | — | $49,999 |
Polaris also rebuilt the front diff, dropped the PTL limited-slip for a direct drive into the front, and moved to a dual-radiator cooling layout. The drivetrain got built for 275 hp. The factory cage and arms are the parts that didn't get the same upgrade.
Why More Power Hits the Chassis
Horsepower doesn't break arms. Speed does. A car that shows up to the next whoop 5 mph faster sends more energy into the lower arms, the rod ends and the cage mounts every single time it lands. Stock arms bend, and a bent arm throws off your alignment for the rest of the day. A stock cage is fine until the day you actually need it.
Wolfpack Pro R/Turbo R chromoly lower arm next to a stock arm on the bench. Alt: "Wolfpack 4130 chromoly lower A-arm compared to stock Polaris RZR Pro R arm"]
Wolfpack Pro R / Turbo R Chromoly Arms
- Material: 1.5" x .120 wall 4130 chromoly tube
- Rod ends: 3/4-16
- Uniball: 7/8"
- Pivot bushings: Delrin
- Ground clearance: 1" more than stock
- Weight: 35 lbs
- Price: $1,375 – $3,425 depending on configuration
Full breakdown in our Pro R / Turbo R chromoly arms write-up, or shop the Pro R suspension category.
Wolfpack Pro R Cages
Every Wolfpack Pro R cage is DOM steel, not seam-welded mild steel (here's why that matters), TIG-welded in-house.
- Tube: 1.75" x .120 DOM main structure, 1.75" x .095 DOM support tubes
- Race cage: $3,995
- 2-seat cage: $999 – $2,350
- 4-seat flat top cage: $1,200 – $2,550
The Boost comes in 2- and 4-seat versions, and so do our cages. Shop Pro R cages.
4-seat flat top cage on a Pro R 4, side profile. Alt: "Wolfpack 4-seat flat top DOM cage for Polaris RZR Pro R 4"]
FAQ
Will Wolfpack Pro R arms and cages fit the 2027 Pro R Boost?
The Boost stays at 74" wide on the Pro R platform, and Polaris hasn't announced frame or suspension-geometry changes. We'll test-fit on the first Boost we get our hands on in November and confirm fitment here. Call us at 714-694-3797 before you order.
Do I need arms if I'm not racing?
If you drive fast through rocks or whoops, yes. Stock arms bend on rock strikes, and a bent arm means a tow home or an alignment fix before you can drive it again. 4130 chromoly takes the hit and keeps its shape.
Why 4130 arms and DOM cages?
Each material fits its job. 4130 chromoly gives you strength without weight in the suspension, where unsprung weight matters. DOM gives the cage a consistent wall with no weld seam to split.
Join the Wolfpack
275 hp is coming in November. Get the chassis ready before it shows up. Shop Wolfpack Pro R cages and Pro R suspension, call us at 714-694-3797, and follow the build at @utvwolfpack. Join the Wolfpack.