Description
Feuling Endurance Beehive Valve Spring Kit for Milwaukee-Eight Engines
The Feuling Parts Endurance Beehive Valve Spring Kit improves valve-train stability and durability for Harley-Davidson® Milwaukee-Eight engines. First, it installs as a true bolt-in upgrade up to .565” cam lift, so you can add performance without machining or rocker box clearancing when used within that range.
In addition, Feuling builds these Endurance Beehive springs from high-tensile chrome silicon ovate wire, which helps control harmonics and reduce valve float. As a result, the engine revs quicker and runs smoother. At the same time, the beehive design lowers valve-train mass, which improves stability at higher RPM.
Lift Capability and Performance Use
This kit supports direct bolt-in installation up to .565” lift. However, FEULING High Load Springs can support up to .650” lift. In that case, machining may be required depending on camshaft choice. Because of this, the kit works well for stock engines as well as performance cam upgrades.
Choose Your Kit: 1107 vs 1108
Feuling 1107 – Standard Retainers
The 1107 kit suits most street and performance builds. Specifically, it uses high-strength steel retainers to deliver reliable valve control and long service life. Therefore, it works well for moderate to higher-lift camshafts.
Feuling 1108 – Titanium Retainers
The 1108 kit includes lightweight titanium retainers. Because of this, it reduces reciprocating mass and improves valve response. Consequently, this option fits aggressive cam profiles and higher-RPM builds.
What’s Included
Each kit includes all required components. Specifically, you receive:
-
Matched set of FEULING® Endurance Beehive® valve springs
-
Machined spring seats
-
Seat shims
-
Valve locks
-
Premium Viton® valve seals with spring-loaded valve stem wipers
As a result, installation remains consistent and reliable.
Spring Pressure Specifications
-
134 lbs @ 1.375” (0.405” lift)
-
127 lbs @ 1.405” (0.435” lift)
-
125 lbs @ 1.415” (0.445” lift)
-
121 lbs @ 1.435” (0.465” lift)
-
116 lbs @ 1.455” (0.485” lift)
-
113 lbs @ 1.470” (0.500” lift)
-
109 lbs @ 1.490” (0.520” lift)
-
103 lbs @ 1.520” (0.550” lift)
Additionally:
-
Open pressure: 226 lbs @ 0.970”
-
Coil bind: 0.920”
Cam specs measured on the lifter at 0.050” lift with a 1.61 rocker arm ratio.
Fitment
This kit fits Milwaukee-Eight engines from 2017–2021. Furthermore, it works with stock 6mm triple-groove valve stems and stock or Screamin’ Eagle® heads. If desired, you may use factory retainers when titanium retainers are not selected.
Overall, the Feuling Endurance Beehive Valve Spring Kit delivers quicker revving, smoother motion, and dependable valve-train control. Most importantly, it offers a proven bolt-in solution for Milwaukee-Eight performance builds.
