Top End

Forged from 8620 steel, heat-treated then shot-peened for additional strength and durabilityRocker arms have .75" long bushings instead of the .50" long bushings found on most other rocker armsFeature a modified lubrication system with unrestricted...

Forged from 8620 steel, heat-treated then shot-peened for additional strength and durabilityRocker arms have .75" long bushings instead of the .50" long bushings found on most other rocker armsFeature a modified lubrication system with unrestricted...

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

Unique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to .585" with 1.800"/130 lb. installed height, 325 lb. at max liftIncludes springs, top and bottom collars, keeper shims and valve sealsMade in the U.S.A.

High port flow gives great performance now, and more later when additional upgrades are doneHeads are fully assembled with springs and valvesCompression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression...

High port flow gives great performance now, and more later when additional upgrades are doneHeads are fully assembled with springs and valvesCompression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression...

Include springs, upper and lower collars and keysFor valve lift to .650" with 1.860"/178 lbs. installed height, 376 lbs. at max liftMax 6500 rpmMade in the U.S.A.

Kibblewhite Top End Service Kit 82-83950 Polaris -- RZR S 1000 EPS 4x4 -- (2018, 2019, 2017, 2016, 2020, 2021); Polaris -- RZR Trail S 1000 Ultimate 4x4 -- (2022); Polaris -- RZR Trail S 1000 Premium 4x4 -- (2022, 2021); Polaris -- RZR XP 1000 4x4 --...

Kibblewhite Top End Service Kit 82-83900 Polaris -- Ranger XP 900 EPS 4x4 -- (2014, 2019, 2017, 2018, 2016, 2015); Polaris -- RZR 900 4x4 -- (2018, 2019, 2015, 2017, 2016, 2020)

Black Diamond? valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond? valves feature one-piece construction and hard chrome stemsSpring sets contain...

Black Diamond? valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond? valves feature one-piece construction and hard chrome stemsSpring sets contain...