PRI 2025 Innovations That Keeps Engines Turning For over a century, Cloyes has led the way in timing innovation. At PRI 2025, we're showcasing our latest advancements in engine timing, front-end accessory drive, and performance technology. All engineered with precision and durability professionals trust. Explore our lineup below and download detailed sell sheets to see how Cloyes keeps engines, and industry turning. Cloyes Performance Timing Quick Button Timing Cover 9-221, 9-231 GM HEX-A-JUST® Timing Set 9-3100AZ GM LS HEX-A-JUST® Timing Set 9-3158AZ GM Big Block Race Billet Timing Set with True® Roller Chain 9-3610TX9 Tensioner Elimination Set GM Gen V 9-3678X5 Phaser/Tensioner Elimination Set GM Gen V "Z Chain" 9-3679X5Z Ford SB Quick Adjust® Timing Set with "Z" TRUE Roller Chain 9-3735Z Billet Crankshaft Sprocket Upgrade Ford Coyote S1015 & S1039 Front-End Accessory Drive Products Accessory Drive Belt Tensioner B20554HP Accessory Drive Belt Tensioner B20573HP