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

Feuling Race Series lifters are full-travel hydraulic lifters machined from steel and engineered to handle large-lift cams and high valve spring pressures with a slower bleed-down rate. Designed for performance V-twin engines running 185+ lbs of valve spring seat pressure, these lifters maintain proper top-end oil flow and reduce valve float for maximum lift and RPM stability.

Features

• Steel body construction
• Full-travel hydraulic design
• Slower bleed-down rate for high-spring-pressure cams
• Spin-Tron dyno developed and track proven
• Compatible with Feuling HP+ or Race Series oil pumps
• Recommended for strip and performance street engines
• Made in the U.S.A.

Specifications

• Brand: Feuling
• Manufacturer Part #: 4055
• Length: 6.3 in
• Width: 5.05 in
• Height: 3.5 in
• Weight: 1.21 lbs

Fitment

Fits V-twin motorcycle engines, particularly those running large-lift camshafts and higher valve spring pressures above 185 lbs seat pressure.

Frequently Asked Questions

What valve spring pressure do these lifters handle?

Feuling Race Series lifters are recommended for engines running valve spring seat pressures higher than 185 lbs.

Do I need a special oil pump with these lifters?

Feuling recommends a high-volume oil pump for quieter, better-performing lifters. They are compatible with Feuling HP+ or Race Series oil pumps.

Are these lifters street-legal?

Yes — they are designed for use with both street and strip engines.

Are these lifters made in the U.S.A.?

Yes — Feuling Race Series lifters are manufactured in the U.S.A.

Will these work with stock cams?

These are designed for large-lift camshafts and high valve spring pressures. Consult Feuling for compatibility with your specific cam profile.