Andrews TW26a Series Chain Drive Camshafts For Harley Twin Cam 1999-2006

Andrews TW26a: The “Bagger Cam” Legend for Early Twin Cams

The Andrews TW26a Series Chain Drive Camshafts for 1999-2006 Harley models represent the 2026 gold standard for sensible, high-impact engine tuning. While many high-lift cams require extensive head work and spring changes, the TW26a is celebrated for its “bolt-in” simplicity. It is specifically tailored for heavy motorcycles—such as the Ultra Classic or Road King—where low-end grunt is more valuable than high-RPM horsepower. By keeping the intake valve closing point early, the TW26a builds higher cylinder pressure at lower engine speeds, resulting in a bike that feels lighter and more responsive the moment you twist the throttle. For the rider navigating the varied terrains of 2026, from urban stop-and-go to steep incline hauling, the TW26a provides the secure, industrial-strength utility required to make your Twin Cam 88 or 95 feel like a much larger displacement engine.

Precision Grind for Silent and Reliable Performance

What sets Andrews Products apart in the 2026 marketplace is their mastery of cam lobe geometry. The TW26a features a “slow-opening” ramp design that reduces valvetrain noise and stress, ensuring that your engine remains as quiet as it is powerful. These cams are ground from premium alloy steel billets and heat-treated to exacting specifications to resist the surface wear common in high-mileage V-Twins. Because they are designed for the original 1999-2006 chain-drive system, they maintain the mechanical integrity of your engine’s internal timing while offering a much broader powerband than the restrictive factory profiles. Whether you are running a stock compression ratio or a mild 9.2:1 big bore kit, the TW26a ensures that your Stage 2 2026 build is optimized for real-world reliability and “seat-of-the-pants” torque.

Expert Installation & Performance Advice

As specialists in Twin Cam performance, we recommend the TW26a for any rider who feels their early EFI or Carbureted 88 is “falling flat” on hills. Pro Tip: To truly unlock the potential of these cams in 2026, we highly suggest a Stage 1 intake and exhaust upgrade to allow the engine to breathe. Installation Note: When opening the cam chest on a 1999-2006 model, this is the critical time to inspect or replace your spring-loaded cam chain tensioners; we recommend upgrading to high-performance pads or a hydraulic conversion for 2026 peace of mind. Maintenance Note: Use a high-quality 20W-50 motorcycle oil with high zinc/phosphorus content to ensure the new cam lobes “mate” perfectly with your lifters. Safety Note: Always use new inner cam bearings (such as Koyo/Torrington) during installation, as the factory INA bearings are a known weak point in early Twin Cam engines.

The Professional Standard for Reliable V-Twin Torque

Choosing Andrews TW26a Series Camshafts means investing in unmatched mechanical efficiency and riding enjoyment. It offers a unique combination of modern CAD-designed timing and a robust construction that honors the legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, the Andrews TW26a is the unmatched leader. Swap the cams, feel the torque, and ride the distance.

Features:

• Only the best alloy steel billets and heat-treating processes are utilized
• Made in the USA

TW26a Cam Specs:

• Bolt-in cam 88-95 inch motor with stock compression ratio
• Great for 2 up touring
• Will add torque and HP at lower and middle RPM ranges
• Peak rpm range of 1800-5200
• Intake open/close 11°/35°
• Exhaust open/close 41°/09°
• Intake duration 226°/262°
• Exhaust duration 230°/266°
• Intake lift at TDC .138°
• Exhaust lift at TDC: .112°
• Intake lift .490″
• Exhaust lift .490″
• Uses stock springs and tappets

Note: Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance.