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$884.95
Unlock your Twin Cam’s full potential with the HPI Max Flow™ Throttle Body – 58 mm, precision-engineered for maximum horsepower and smooth throttle response. This premium billet aluminum upgrade is designed to handle the airflow demands of high-performance and large-displacement engines while maintaining OEM fitment and compatibility.
Every unit is CNC-machined, internally ported, and fitted with a sealed double roller bearing for reliable, precise throttle operation. The large plenum intake design improves airflow velocity and power delivery, especially in the mid- and high-RPM range.
Proudly Made in the USA, this throttle body offers dyno-proven results and unmatched quality for riders serious about performance.
Direct OEM Replacement: Fully replaces factory throttle body and manifold — retains OEM sensors and compatibility.
Precision Engineering: CNC-machined from billet aluminum with sealed double roller bearings for smooth control.
Maximized Airflow: 58 mm bore and large plenum design optimized for mid-range and top-end power.
Fully Ported Interior: Enhances throttle response and volumetric efficiency.
Performance-Built: Ideal for large cubic-inch or high-output Twin Cam motors.
Made in the USA: Built by performance experts for serious Harley-Davidson tuners.
Fits the following Harley-Davidson® Twin Cam models (2001–2005):
Touring Models:
FLTRI Road Glide (2002–2005)
FLHRI Road King (2002–2005)
FLHRCI Road King Classic (2002–2005)
FLHTI Electra Glide Standard (2003–2005)
FLHTCI Electra Glide Classic (2002–2005)
FLHTCUI Electra Glide Ultra Classic (2002–2005)
Softail Models:
FLSTFI Fat Boy (2002–2005)
FLSTCI Heritage Softail Classic (2001–2005)
FLSTNI Softail Deluxe (2005)
FXSTI Softail Standard (2001–2005)
FXSTDI Softail Deuce (2001–2005)
FXSTBI Night Train (2001–2005)
FXSTSI Springer Softail (2001–2005)
FLSTSI Heritage Springer (2001–2003)
Dyna Models:
FXDI Dyna Super Glide (2004–2005)
FXDLI Dyna Low Rider (2004–2005)
FXDWGI Dyna Wide Glide (2004–2005)
FXDXI Dyna Super Glide Sport (2004–2005)
FXDCI Super Glide Custom (2005)
Fitment based on stock configurations. Not legal for sale or use in California on pollution-controlled vehicles.
Product Name: Throttle Body
Model: Max Flow™
Type: Single Bore Throttle Body
Bore Size: 58 mm
Material: Billet Aluminum
Color/Finish: Black Anodized
Features: Internally Ported / Sealed Roller Bearing / 1.80″ Intake Runner
Compatibility: Twin Cam Engines (2001–2005)
Units: Each
Riding Style: Street / Performance / Touring
Made in: USA
Answer a few quick questions, and we’ll match you with the suspension setup that fits your ride, style, and performance goals.