Description
Master Top-End Rebuild Package for the Polaris RZR and Ranger 800
A cracked or worn intake boot can create an air leak near the cylinder head. Therefore, this Master kit includes an OE-style replacement boot so it can be addressed during the top-end rebuild.
This Kit Includes
- (1) Cylinder assembly
- Upgraded pistons
- (1) Complete top-end gasket kit
- (1) OE-style replacement intake boot
- (2) Exhaust valves
- (2) Intake valves
Model-Specific Fitment
- 2011-2017 Polaris RZR 800
- 2011-2017 Polaris Ranger 800
Inspect the Top End Before Assembly
First, check the cylinder-head surfaces and intake boot mounting area for damage. Next, inspect the valve guides and seats before installing the supplied valves.
- Check the intake boot sealing surfaces
- Inspect the cylinder and head mating surfaces
- Inspect the intake and exhaust valve guides
- Check valve-to-seat contact
- Measure piston ring end gap before assembly
- Verify piston direction and valve clearance
Piston and Valve-Guide Resources
Before installing the pistons, review the REV6 piston and ring installation guide. Also, read the REV6 Polaris valve guide inspection article before reusing the existing guides.
More Polaris RZR and Ranger 800 Parts
Browse Polaris RZR 800 engine parts for 2011-2014 models or Polaris Ranger 800 engine parts for 2011-2017 models.
REV6 Warranty, Financing, and Support
REV6 includes a 1-year parts warranty with this Master Top End Rebuild Kit. Review the REV6 parts warranty policy for coverage details. In addition, qualified buyers can review available REV6 financing options.
You can also contact the REV6 team with questions about the cylinder assembly or confirmed kit contents.













