Top End

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...

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...

Kibblewhite Top End Service Kit 82-83250 Polaris -- Predator 500 LE -- (2005, 2006, 2003, 2007, 2004); Polaris -- Predator 500 Cross Country -- (2005, 2006, 2007, 2004, 2003); Polaris -- Predator 500 50th Anniversary Edition -- (2005, 2004, 2006, 2003,...

Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side modelsCylinder Head Service Kits include the below components:Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...

Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side modelsCylinder Head Service Kits include the below components:Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...

Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side modelsCylinder Head Service Kits include the below components:Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...