Polaris RZR Pro XP, Turbo R & 2021-2022 XP Turbo/S Silver Primary Clutch Spring

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Primary Clutch Springs are all about resistance. The higher the resistance, the higher the RPM engagement. Low Engagement springs are designed for smoother takeoffs and more feasible for trail riders who vary speeds constantly. High Engagement Springs, like our Shift-Tek Silver Spring, are more desired for racing and drag set-ups. This High Engagement spring was designed and tested to increase engagement to about 2200 RPM when used with Stock Clutch Weights, compared to the stock spring with an 1800 RPM engagement.
If you plan on upgrading to the EVP Exclusive 2-Step Launch Control, we recommend our Shift-Tek Ultimate Clutch Kit, which pairs this High Engagement Silver Spring with weights, turquoise secondary spring, and helix.

1 x Polaris RZR Pro XP, Turbo R & 2021-2022 XP Turbo/S Silver Primary Clutch Spring

The EVP Shift-Tek Silver Spring, when used with stock clutching will net about 2200 RPM Engagement, which is high enough to use for our EVP Launch Control programming, but we recommend our Shift-Tek Ultimate  Clutch Kit  which pairs the High Engagement Silver Spring with weights, turquoise secondary spring, and helix. 


This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA -certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA -certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law. Questions: Call Evolution Powersports at (715) 247-3862.


My car is absolutely insane. LOVE it. Thank you for everything. Zero issues and even in 95 degree ambient it's not over heating dining or anything. This power dining is 100% perfect. Car is a beast. You guys Rock! - Dynomite Turbo Kit


Evolution Powersports has a reputation of the utmost quality and attention to detail on every product they design. From within the industry and outside, I have heard nothing but great things about this company and my experience has been the same. If you are looking to make more reliable power this company can get you there. Both customer service and product design are top notch and they stand behind their work!

Blake S

Don’t spend much of your money here unless you want gobs and gobs of reliable power

Collision Vision

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Ryan L

If you truly want to build your project with the best possible parts available, buy EVO. They not only build with the best materials they test and test to make sure you are getting the performance gains they say you will but that the mods will be safe and keep the reliability of the machine as high as possible. Thanks again to both Jim and Todd. Keep it up guys!

John K

Great customer service!
I have had such a great experience with EVO over the course of a year, I wouldn’t even try going anywhere else. Prices are fair and the performance you receive is unreal!!

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