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or trail riding over rocks and logs
the Valor V01 on the all new Alpha UTV tire
**Will not work with 187
(2) Uniballs
EVP Head Shim Kit for Polaris RZR Pro R Suspension & Steering or trail riding over rocksDESCRIPTION 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
