Andrews Transmissions

Andrews Products: A Legacy of American Drivetrain Performance

When it comes to extracting more power and reliability from a Harley-Davidson powertrain, few names carry as much weight as Andrews Products. Founded in 1968 and headquartered in Atlanta, Georgia, Andrews has spent over five decades engineering precision drivetrain components that enthusiasts and professional builders trust to deliver real-world performance gains — not just dyno numbers.

Andrews built its reputation on one simple philosophy: manufacture components to tighter tolerances and better metallurgical standards than what comes stock. That commitment has made Andrews a go-to source for riders who demand more from their machines, whether they're building a street cruiser, a touring bike, or a dedicated drag strip weapon.

Transmission Expertise

At the core of the Andrews catalog is its legendary line of manual transmission gear sets. These close-ratio and wide-ratio gear sets are machined from premium steel and engineered for smooth, precise shifts under hard acceleration. Andrews offers gear sets covering a wide range of Harley-Davidson Big Twin and Sportster applications, making it straightforward to find the right fit for a specific build. For riders looking for individual replacement components, Andrews also carries a broad selection of manual transmission gears — ideal for rebuilding or upgrading an existing unit one piece at a time.

Beyond internal gearbox components, Andrews rounds out its transmission lineup with a selection of complete transmissions and related hardware, giving builders a single-source solution for a full drivetrain refresh. The brand also offers automatic transmission covers that complement their drivetrain component lineup with the same attention to fit and finish.

Camshafts and Valve Train Components

Andrews is perhaps best known outside the transmission world for its camshaft grinds. Developed with decades of real-world testing, Andrews cams are available in a wide range of lift and duration specifications to match everything from mild street touring setups to aggressive performance builds. Complementing the cam lineup, Andrews produces a full range of valve train components — including pushrods and related hardware — engineered to work in concert with their camshaft profiles for a cohesive, reliable valvetrain system.

Why Andrews?

• Decades of application-specific engineering focused on Harley-Davidson platforms
• Tight manufacturing tolerances for consistent fitment and long service life
• Wide range of specifications to suit street, touring, and performance builds
• Trusted by professional builders and everyday riders for over 50 years

Whether you are refreshing a worn gearbox, upgrading camshaft timing for more midrange torque, or building a ground-up performance motor, Andrews Products delivers the quality and application depth that serious Harley-Davidson enthusiasts have relied on since 1968.