Feuling Lifters - Race Series (4052 / 4019) — Harley-Davidson Softail Heritage Classic, Road King, Softail Fat Boy (1999-2025)

Feuling Race Series hydraulic lifters engineered for high-lift camshafts and aggressive valve spring pressures in V-twin engines. Steel-body construction with a slower bleed-down rate maintains oil flow to the top end while reducing valve float and promoting maximum valve lift.

Features

• Steel body construction
• Slower bleed-down rate for high valve spring pressures
• Maintains oil flow to top end
• Reduces valve float and promotes maximum valve lift
• Spin-Tron dyno developed and track proven
• Compatible with Feuling HP+ and Race Series oil pumps
• Made in the U.S.A.

Specifications

• Brand: Feuling
• Manufacturer Part #: 4019
• Length: 6.2 in
• Width: 4.9 in
• Height: 3.45 in
• Weight: 1.28 lbs

Fitment

Fits V-twin motorcycle engines. Feuling recommends Race Series lifters for engines running higher than 185 lbs. valve spring seat pressure.

Frequently Asked Questions

What valve spring pressure do these lifters support?

Feuling recommends Race Series lifters for engines with valve spring seat pressure higher than 185 lbs.

Do I need a different oil pump with these lifters?

These lifters are compatible with Feuling HP+ or Race Series oil pumps. A high-volume oil pump is recommended for quieter, better-performing lifters.

Are these street legal?

Race Series lifters are designed for both street and strip engines. Check your local regulations if turbocharged or supercharged modifications apply.

What's the main advantage over stock lifters?

Race Series lifters handle higher valve spring pressures with a slower bleed-down rate, reducing valve float and maintaining oil flow on high-lift cams.