EVP Head Shim Kit for Polaris RZR Pro R Suspension & Steering All surfaces must be completely

All surfaces must be completely free from dirt and debris

EVP Big Injector Tunes also require upgraded BOV or BRV

FK Spherical Heims

This allows these parameters to be displayed right on the factory dash cluster without requiring a dash flash

or trail riding over rocks and logs

EVP Head Shim Kit for Polaris RZR Pro R Suspension & Steering All surfaces must be completelyDESCRIPTION EVP engineers designed and manufactured the ultimate game changer when it comes to lowering compression for the RZR Pro R. Stock compression ratio on the N A ProStar 2. 0L engine runs high at 12. 5: 1, which is inadequate for any turbo upgrade engine build running high boost and big horsepower. The new EVP Head Shim Kit for Pro R's lowers compression to 10. 8: 1 to help reduce air fuel temperatures and thus prevent detonation as well as