2017-'21 Polaris RZR XP Turbo/S Without FPCM Maptuner ECU Power Flash SELECT MAPTUNER DEVICE TO PURCHASE WITH YOUR TUNES:Already Own Maptuner We use these head studs

We use these head studs in all of our high boost applications with zero head gasket failures

and heavily loaded

Parts Stock 91 8-12 lbs

Includes a prefilter to keep dirt/sand out of the valve exhaust ports

the Alpha Belt consistently showed the highest horsepower runs vs OEM or any of the other compounds we tested

2017-'21 Polaris RZR XP Turbo/S Without FPCM Maptuner ECU Power Flash SELECT MAPTUNER DEVICE TO PURCHASE WITH YOUR TUNES:Already Own Maptuner We use these head studsDescription STOCK INJECTORPOWER FLASH STAGES FUEL TYPE BOOST PRESSURE WHP CRANKHP (APPROX.) REQUIRED PARTS Stock 91 16 152 168 N A Stage 2 91 91 17. 5 162 180 N A Stage 3 93 93 18. 5 166 185 Gap Spark Plusto . 018 or purchase pre gapped plugs. Stage 4 96 96 20 169 189 Gap Spark Plusto . 018 or purchase pre gapped plugs. STOCK INJECTOR NOTE: Stage 3 93 and up require the spark plugs be gapped to . 018, or purchase EVP PRE GAPPED PLUGS. BIG INJECTOR