Cable Driven 51mm Big Bore Throttle Body 2001-2005

Cable Driven™ 51mm Big Bore Throttle Body – CNC Ported Intake System (Black)

Precision-Engineered Airflow Upgrade for Harley-Davidson Twin Cam Engines

The Cable Driven™ 51mm Big Bore Throttle Body delivers the perfect balance of precision machining, performance, and reliability for Harley-Davidson Twin Cam engines. Designed, machined, and tested in the USA, this throttle body system is flow bench-tested and dyno-proven to increase airflow, horsepower, and torque while maintaining OEM electronics and cruise control compatibility. Crafted from CNC-machined aluminum and internally ported for maximum flow, it’s a top-tier upgrade for serious performance bagger and Twin Cam builds.

⚠️ WARNING: Not legal for sale or use in California on any pollution-controlled motor vehicles. See manufacturer documentation for emission and compliance information.

Key Features

• Includes CNC ported throttle body, intake manifold, throttle cable bracket, flanges, and seals
• Flow bench-tested and dyno-proven to deliver measurable power gains
• Brass throttle blade resists deflection for precise throttle response
• Sealed double roller bearing ensures smooth, consistent throttle operation
• Fully CNC machined and internally ported for maximum airflow and torque
• Compatible with all OEM electronics and cruise control systems
• Stock bolt pattern and air cleaner opening for seamless installation
• Made in the USA with premium aluminum construction
• Emissions-related component — not legal for sale or use in California

Performance & Fitment

This 51mm Big Bore Throttle Body is designed for Harley-Davidson Twin Cam Touring, Dyna, and Softail models (2001–2005). It’s ideal for engines with mild-to-moderate modifications or for riders seeking a performance upgrade without sacrificing rideability. Perfectly complements Nowaskey Performance builds and Hofmann Designs custom setups, delivering sharper throttle control, better midrange response, and dyno-verified horsepower increases.

Compatible Models Include:

• Touring: Road King, Electra Glide, Road Glide (2002–2005)
• Softail: Fat Boy, Heritage Classic, Deuce, Night Train, Springer (2001–2005)
• Dyna: Super Glide, Low Rider, Wide Glide, Super Glide Sport (2004–2005)

Bore Size: 51.00 mm
Model: Cable Driven™
Material: CNC-Machined Aluminum
Color/Finish: Black
Features: Intake Runner 1.66″, Sealed Double Roller Bearing
Units: Each
Weight: 2.9 lbs
Dimensions (L x W x H): 9.35″ x 6.52″ x 6.37″
Country of Origin: Made in the USA