.491 Distributor Gear Everwear Chevy V8/V6- 90

The .491 Distributor Gear Everwear for Chevy V8/V6 engines is a precision timing component engineered for mechanics and engine builders who demand reliability in high-performance and stock applications. This small but critical gear sits at the heart of your engine's ignition system, directly affecting spark timing accuracy and overall engine performance. Whether you're rebuilding a classic small-block or maintaining a modern LS platform, a worn distributor gear leads to timing drift, misfires, and potential power loss—making this replacement gear essential for any serious Chevrolet engine modification or restoration project.

Manufactured by Howard's Racing Components, a trusted name in performance timing components, the .491 gear features Everwear material technology—a proprietary blend designed to resist the constant wear and micro-welding that occurs between the distributor gear and the camshaft gear under continuous operation. This material composition dramatically extends gear life compared to cast iron OEM units, which can develop wear patterns that alter ignition timing over 50,000–100,000 miles. The tight tolerances and precise tooth geometry ensure repeatable spark delivery, critical for tuned engines where even a few degrees of timing variance causes detonation, reduced fuel economy, or cylinder damage. At just 0.2 lbs, the compact design maintains the stock form factor while delivering measurable durability gains.

This distributor gear suits both V8 and V6 Chevrolet platforms—from first-generation small-blocks (265–400 cu in) through later carbureted and fuel-injected variants. Installation is straightforward for any mechanic: the gear slides onto the distributor shaft during distributor assembly or replacement, requiring no special tools beyond a standard socket set. Builders upgrading worn distributors, converting to performance ignition systems, or simply maintaining factory reliability will find this gear indispensable. For longevity-focused builds targeting 10,000+ rpm sustained operation or extended street use, Everwear material is a low-cost insurance policy against timing creep and the cascading failures it causes.