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KPMI H.T. Steel Cylinder Stud Kits Polaris RZR | Ranger | Sportsman



Model #82-83500

Shopper Award

KPMI manufactures and distributes an extensive line of valvetrain and select Tools & Components for the motorsports industry, worldwide. The KPMI product brand coverage include: Harley Davidson's, Sport Bikes, Dirt Bikes, ATV/UTV's, Tourers, Cruisers, Customs and Classics. KPMI will also custom manufacturer to your specifications.

All KPMI valve guides, standard valves, and spring kits are intended for use as OEM replacement parts, exceeding OEM specifications in terms of durability and expected cyclical life. Oversize valves are intended for racing vehicles with planned use on closed courses.


  • These High Performance Cylinder studs are made from 180,000 psi yield strength, fine grain, heat treated, premium grade 8740 material
  • Threads are rolled after heat treating to insure maximum compressive stresses are retained, insuring maximum strength, and the longest fatigue life possible
  • The case end threads are designed to have a slight interference fit to maintain good thread contact at high temperature
  • Studs are center less ground to insure concentricity, and finished with a premium black oxide treatment , excellent appearance

  • Polaris RZR 570 EPS 2013
  • Polaris Ranger 570 EPS 2014-2015
  • Polaris Ranger 570 [Fullsize] 2015
  • Polaris Sportsman 570 SP 2015
  • Polaris Sportsman X2 570 EPS 2015
  • Polaris Sportsman Touring 570 EPS 2015
  • Polaris Sportsman Touring 570 SP 2015
  • Polaris RZR 570 2012-2015
  • Polaris Ranger 570 2014-2015
  • Polaris Ranger Crew 570 2015
  • Polaris Sportsman 570 2014-2015
  • Polaris Sportsman 570 EPS 2014-2015
  • Polaris Sportsman Touring 570 2014-2015
  • Polaris Ranger Crew 570 [Fullsize] 2015
  • Polaris Ranger Crew 570 EPS [Fullsize] 2015
  • Polaris RZR 570 Trail EPS 2015
  • Polaris Sportsman 570 HD 2015

Other Part Numbers:
KPMI #191-88001

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm

Vehicle Engine Notes
Polaris RZR 570

Polaris Ranger 570

Polaris Sportsman 570


KPMI (Kibblewhite Precision Machining) is a global manufacturer and distributor of valvetrain and specialized tools and components for the racing area. The KPMI product line comprises of Harley-Davidson motorcycles, sports bikes, valves, dirt bikes, ATVs, UTVs, tourers, cruisers, customs, and classics, as well as Jet Skis, Water Skis, and watercraft.

History of KPMI

James L. Kibblewhite formed the legacy of Kibblewhite Precision Machining, Inc. in 1939. In 1989, Jamesís son, William F. Kibblewhite, took over the operation. William Kibblewhite built on his father's good work and added a lot more products to the line of the automotive industry.


KPMI maintains a warehouse and supplies over 3,000 items to its consumers worldwide. There is no other company in the world that has such a wide range of products for the motorsports industry. Not only does KPMI manufacture finished products, but it also provides contract manufacturing services to OEMs and other third parties. Engineering, prototyping, and limited or full production runs are just some of the services they offer.


KPMI has five locations and a combined total of over 20,000 square feet of a machine shop, office, engineering, and warehouse space. KPMI has invested heavily in upgrading its operations during the last five years. As a company, they have eleven cutting-edge CNC lathes and other cutting-edge tools in their entire facility.

KPMI Quality

KPMI's objective is to supply consumers with products that function correctly the first time and deliver the best value for money in terms of reliability and performance. None of their products reaches final approval without first enduring a development flow procedure. Three signatures from engineering and one from production are required for final evaluations. This means that each product undergoes three independent assessments throughout its development process before a final product is launched.


Vivid Racing includes a wide collection of KPMI valve products, such as exhaust and intake valves, wrist bushing twins, service kits, seal valves, spring kits, and many more!

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