Moose Offroad Polaris ACE 570 | Ranger 570 | RZR 570 Replacement Cylinder - 99mm
The Moose Offroad Polaris ACE 570 | Ranger 570 | RZR 570 Replacement Cylinder - 99mm rebuilds the 567cc ProStar engine to big bore performance specifications for enhanced trail capability. Precision-cast aluminum cylinder increases displacement to approximately 760cc while maintaining stock port timing and combustion chamber design. Direct OEM replacement restores compression and eliminates cylinder wear, scoring, and taper issues common in high-hour 570 platforms.
Features
- 99mm big bore casting delivers significant torque and horsepower gains.
- Factory-matched port timing preserves stock cam timing requirements.
- Pre-machined combustion chamber eliminates surface finishing needs.
- Compatible with stock piston, rings, head gasket, and base gasket.
- Nikasil-plated cylinder liner resists galling and wear under abuse.
- Direct drop-in replacement uses existing studs and mounting points.
- Increased cooling capacity handles sustained high-RPM operation.
- Made in USA quality control ensures consistent wall thickness.
Specifications
- Product Name: Cylinder
- Color/Finish: Gray
- Material: Aluminum / Cast
- Cylinder Bore Coating: Nickel-Silicon Carbide
- Cylinder Diameter: 99.00 mm
- Bore Size: Standard
- Displacement: 570 cc
- Engine Type: 4-Cycle
- Units: Each
- Riding Style: UTV / ATV
Fitment
- ACE (2016)
- ACE 570 4x4 (2015)
- ACE 570 (2017)
- ACE 570 EPS (2019)
- ACE 570 SP (2015-2019)
- Ranger 570 (2016-2021)
- Ranger 570 (Mid-Size) EPS (2015-2019)
- Ranger 570 (Full-Size) 4x4 (2013)
- Ranger 570 EPS Full-Size (2015-2016)
- Ranger 570 Premium (2021)
- Ranger 570 XP (2016)
- Ranger 570-6 Crew (2016)
- Ranger Crew 570 (2014)
- Ranger Crew 570 4x4 (2016-2021)
- Ranger Crew 570 EPS (2015)
- Ranger Crew 570 EPS 4x4 (2016-2019)
- Ranger Crew 570 EPS Full-Size (2015)
- Ranger Crew 570 Full-Size (2015, 2021)
- Ranger Crew 570 Premium 4x4 (2021)
- Ranger Crew 570-6 (2018-2020)
- Ranger Crew 570-6 (Full-Size) 4x4 (2022-2023)
- Ranger Crew SP 570 (2022-2023)
- Ranger Crew SP 570 NorthStar Edition (2022)
- Ranger Crew SP 570 Premium (2022-2023)
- Ranger SP 570 (2022-2023)
- Ranger SP 570 NorthStar Edition (2022)
- Ranger SP 570 Premium (2022-2023)
- RZR 570 (2014-2018, 2021-2022, 2024)
- RZR 570 4x4 (2013)
- RZR 570 EPS (2018-2019)
- RZR 570 EPS Trail (2015-2016)
- RZR Trail 570 (2021-2022)
- RZR Trail 570 Premium 4x4 (2021)
- Ranger RZR 570 (2012)
