Andrews Valve Train

Andrews Valve Train: Precision-Engineered Performance for V-Twin Engines

When it comes to extracting real performance from a Harley-Davidson engine, few upgrades have more impact than the valve train — and few names carry more weight in that space than Andrews Products. Founded in the spring of 1972, Andrews has specialized in making camshafts and related performance components for the motorcycle industry ever since, building a reputation that spans decades of dyno-proven results on both street and strip.

Built to a Higher Standard

Each high-performance cam is computer-designed using modern CAD programming, then CNC machine-ground from alloy steel billets and heat treated for maximum durability and power. The most accurate measurement systems, integrated with computer-controlled CNC machining, ensure that customers receive parts that always meet specifications. That commitment to precision is what separates Andrews valve train components from generic off-the-shelf alternatives.

A Valve Train Lineup Built Around Your Riding Style

Andrews' valve train catalog covers a wide range of Harley-Davidson engine families, from classic Shovelhead and Panhead motors to the Evolution Big Twin and Twin Cam platforms. Within that lineup, riders will find options tuned for very different goals:

• Chain Drive Camshafts (TC Series): Chain driven cams maximize low-end and mid-range torque — ideal for heavily laden touring bikes and two-up riders who want strong, accessible pull without sacrificing everyday rideability.
• Bolt-In Cams: Bolt-in type cams are intended for stock compression ratios, making them an accessible first upgrade that requires minimal supporting modifications.
• High-Lift & Gear Drive Cams: For builds pushing higher compression and displacement, Andrews offers aggressive grinds and gear-driven options that deliver power deeper into the RPM range. Conversion cams and gear-drive variants are available for multiple Twin Cam generations.
• Pushrods & Valve Springs: EZ-Install adjustable pushrod kits and high-lift valve springs round out the valve train package, ensuring the entire system works in harmony for reliable, consistent performance.

Why Andrews Stands Apart in the Valve Train Category

Founded in 1972, Andrews has specialized in camshafts and transmission gears for the performance motorsports industry — and performance camshafts along with related valve gear parts soon became additional areas of expertise. That singular, decades-long focus means Andrews engineers understand the nuances of cam lobe profiles, valve timing events, and lift curves in a way that generalist manufacturers simply cannot match. Whether working with top race teams or making parts for street motorcycles, the same technology is used — every Andrews valve train component reflects that no-compromise philosophy.

Whether you're chasing a noticeable bump in mid-range grunt for a weekend touring build or dialing in an aggressive track motor, Andrews valve train products offer a well-documented, trusted path to more power. Explore the full Valve Train category or visit the Andrews brand page to see everything this legendary Illinois manufacturer has to offer.