Racing Spring Kit, 0.450" Lift, Polaris®, Various 900/1000’s, 2013-2023

Polaris® RZR™ XP900 2013-2014
Polaris® Ranger™ 900 XP 2013-2019
Polaris® RZR™ 900 2015-2023 (&Trail)
Polaris® RZR™ XP1000 2014
Polaris® Ranger™ 1000 (&XP) 2017-2023
Polaris® RZR™ 1000 (&S/XP/Trail S) 2015-2023
Polaris® RZR Turbo (&S) / XP Turbo (&S) 2016-2023
Polaris® RZR™ RS1 2018-2022
Polaris® General 1000 (&XP) 2016-2023

Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today's high revving 4-stroke engines.
The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®'s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well.
Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few!
Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.

• The seals included in these kits are intended for use with OEM guides. Please use KPMI® P/N 71016-8 when installing KPMI® guides
• Some early 2013 models came from the OEM with guides that included a seal detail. These guides require the use of KPMI® seal P/N 71015-8