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
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.
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
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