Polaris RZR Pro R 4 Cylinder S4 Clutch Kit with AA Heavy Duty Primary & Secondary by Aftermarket Assassins

Enhance your Polaris RZR Pro R’s performance with the S4 Clutch Kit featuring the AA Heavy Duty Primary and Secondary Clutches by Aftermarket Assassins. Designed to fit all 2022–2025 RZR Pro R 4-cylinder models, including both 2-seat and 4-seat configurations, this complete clutch kit is built to handle everything from trail riding to high-horsepower racing applications. Whether you’re running a stock setup or pushing over 600 crank HP with forced induction, this clutch system delivers unmatched power transfer, belt grip, and acceleration.

The AA Primary Clutch is engineered to outperform OEM designs, offering the option of a full billet clutch or a billet inner sheave with a cast outer assembly for a more economical setup. This design eliminates weak points, reduces belt slip, and withstands the extreme demands of high-performance riding. Expect cooler belt temperatures, longer belt and clutch life, and smoother engagement at approximately 1800–2100 RPM. The kit’s magnetic adjustable clutch weights feature a precision AA profile and nitrocarburized coating for superior durability and adjustability, allowing you to fine-tune performance for any terrain or modification level.

Included in the kit are the AA Primary Clutch, adjustable magnetic weights, setup sheet, primary spring, custom limiter, secondary clutch, AA Helix, and secondary spring. The secondary clutch features a stiffer spring and aggressive shift profile for improved belt grip and faster acceleration. Riders will experience consistent clutch performance whether tackling dunes, mud, or trails. The kit is available in Standard Load and High Load configurations for naturally aspirated setups, as well as 1072 and 1078 Helix options for forced induction machines producing 350–450+ HP.

Optimized for tire sizes ranging from 32” to 37” and paddle tires from 30” to 35”, this clutch kit ensures efficient power delivery and reliable performance under the toughest conditions. It’s a must-have upgrade for anyone looking to maximize throttle response, reduce belt wear, and unleash the full potential of their Polaris RZR Pro R.