Cloyes Engine Timing Gear Set

Cloyes Engine Timing Gear Sets: A Century of Timing Precision

When it comes to engine timing, few names carry the authority of Cloyes. Founded in 1921, Cloyes has spent more than a century as the North American leader in timing drive systems — and their Engine Timing Gear Sets represent the pinnacle of that heritage. Whether you're restoring accurate cam-to-crank synchronization on a daily driver or chasing fractions of a second on a performance build, Cloyes brings a depth of engineering knowledge that few competitors can match.

What Sets Cloyes Timing Gear Sets Apart

Cloyes didn't just participate in the evolution of engine timing — they helped define it. The company developed and patented the very first True® Roller timing set, a landmark innovation that changed how the performance world approaches cam drive accuracy. Later, they introduced the patented Hex-a-Just® timing system, offering infinitely adjustable cam timing that lets builders dial in precise valve events for maximum power or efficiency. These milestones reflect a culture of first-mover innovation that continues to influence the product line today.

The Engine Timing Gear Sets in the Cloyes catalog span a wide range of applications and performance levels:

• Street True Roller Sets — Double-roller designs with iron and steel sprockets engineered for Chevy small-block, Ford small-block, and other popular platforms, balancing durability with street-friendly noise levels.
• Heavy Duty Timing Sets — Built for demanding applications like towing and high-output builds, featuring iron and billet steel gears with added wear resistance for long-term reliability under stress.
• Premium Billet Sets — Billet steel sprockets machined for close tolerances, targeting builders who demand the tightest possible chain-to-sprocket mesh and maximum timing accuracy.
• Hex-a-Just® Sets — The signature Cloyes adjustable system that allows cam timing to be advanced or retarded without removing the timing cover, a significant advantage for tuners and engine builders.

Engineering Quality You Can Trust

Every Cloyes timing gear set is CAD-designed and manufactured using premium materials, then extensively tested to verify function, fitment, and durability before leaving the factory. Timing chains within these sets are engineered with precision pitch control to ensure optimal chain-to-sprocket fit — reducing noise, minimizing stretch, and maintaining accurate timing over the life of the engine. Pre-stressed and heat-treated steel construction provides added strength and wear resistance, especially important in high-heat environments. The result is OE-level quality that meets or exceeds original manufacturer specifications.

Backing that quality is a Limited Lifetime Warranty on qualifying products — a testament to Cloyes' confidence in what they build. As both a Tier 1 OE supplier and a trusted aftermarket brand, Cloyes occupies a unique position: the same engineering standards that go into factory-original parts flow directly into their replacement gear sets.

Coverage Across Domestic Platforms

Cloyes timing gear sets cover an extensive range of domestic engines — from classic Chevy small-blocks and big-blocks to Ford small-blocks and Mopar applications. Whether you're working on a 5.7L LS-based platform, a vintage 350, a Ford Modular, or a Chrysler 318/360, there's a Cloyes set engineered specifically for that application. That breadth of fitment, combined with application-specific design and complete kit packaging, makes Cloyes a go-to choice for professional technicians and serious enthusiasts alike.