Feuling Push Rods - Race Series — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Road King (1999-2017)

Feuling Race Series push rods are tapered 7/16 4130 chrome moly adjustable units designed for high-performance V-twin engines running larger lift camshafts and extreme spring pressures. These CNC-machined rods maintain maximum valve lift and column rigidity to maximize valve-train stability across elevated RPM ranges.

Features

• Tapered 7/16 4130 chrome moly construction
• Individual length intake and exhaust rods minimize adjustment extension
• CNC machined with 32 threads per inch adjustment
• Double jam nut lock system
• 0.120 in wall thickness (Race Series specification)
• Compatible with hydraulic or solid lifters
• Designed for street and race engines

Specifications

• Brand: Feuling
• Manufacturer Part #: 4070
• Material: 4130 Chrome Moly
• Length: 5.3 in
• Weight: 1.41 lbs

Fitment

Fits V-twin motorcycles including Harley-Davidson and Indian Motorcycle engines equipped with larger lift camshafts and high spring pressures.

Frequently Asked Questions

Do these work with solid lifters or only hydraulic?

These push rods are designed for use with both hydraulic and solid lifters in street or race engine configurations.

What makes these different from standard adjustable push rods?

The tapered 7/16 design and minimal adjustment extension eliminate flex and valve-train instability problems common with most adjustable pushrods, while the 0.120 in wall thickness handles extreme spring pressures.

Will these fit my stock Harley engine?

These Race Series rods are engineered for performance engines with larger lift camshafts and high spring pressures. Stock engines may not require this level of stiffness — confirm your setup with Feuling before ordering.

Do I need to remove anything to install these?

Yes — rocker covers and rocker arm supports must be removed during installation.

What adjustment range do these provide?

The 32 threads per inch adjustment with individual length intake and exhaust rods keeps the extension parameter minimal while allowing fine valve lash tuning.