KPMI .625 Lift Titanium Retainer Valve Spring Kit - Harley Milwaukee-Eight Touring & Softail
About KPMI
Kibblewhite Precision Machining supplies valves, valve springs, guides and complete top-end kits used by professional V-twin engine builders. Its black diamond valves and spring kits are a standard specification on high-lift cam builds.
Unleash the full potential of your Milwaukee-Eight engine with the KPMI .625 Lift Valve Spring Kit, featuring lightweight titanium retainers. These springs are precision-wound from premium Kobe Super-Clean chrome silicon wire and heat-treated for exceptional durability. Each kit is engineered using advanced simulation software to optimize cam harmonics, stress distribution, and high-RPM performance, ensuring your engine breathes freely and reliably.
Why riders pick this
- Premium Kobe Super-Clean chrome silicon wire construction
- Heat-treated and shot-peened for maximum durability
- Lightweight titanium retainers reduce valvetrain mass
- Optimized for .625 lift camshafts and high-RPM performance
- Engineered to maintain precise valve timing and prevent float
When pushing the limits of your Harley-Davidson Milwaukee-Eight, reliable valve train components are crucial. The KPMI .625 Lift Valve Spring Kit with titanium retainers is designed for riders who demand peak performance and durability. This kit provides the necessary spring pressure and stability to support aggressive cam profiles, preventing valve float and maintaining precise valve timing even under extreme conditions.
Engineered for High-Performance V-Twins
- Wound from premium Kobe Super-Clean chrome silicon wire for superior strength
- Heat-treated and stress-relieved for enhanced durability and longevity
- Shot-peened finish for increased fatigue resistance under demanding loads
- Lightweight titanium retainers reduce valvetrain mass for faster response
- Engineered for specific cam and spring harmonics to optimize engine performance
The Foundation for Power
Installing a KPMI valve spring kit is a fundamental step in any serious Milwaukee-Eight engine build, especially when upgrading to higher-lift camshafts. These springs provide the stable platform required for consistent power delivery across the entire RPM range. For optimal results, consider pairing this kit with KPMI's high-performance rocker arm tower studs and cylinder studs to create a robust and reliable engine package built to handle the demands of performance riding.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-21800
- Lift: .625 in
- Retainer Material: Titanium
- Length: 6 in
- Width: 2.25 in
- Height: 1.8 in
- Weight: 8 lbs
Common questions
What makes KPMI valve springs different from stock springs?
KPMI springs are engineered for specific applications using advanced simulation software to optimize harmonics, stress distribution, and RPM performance beyond stock specifications, providing superior durability and performance for upgraded engines.
What is included in this valve spring kit?
This is a complete valve spring kit designed for .625 lift applications, including springs and lightweight titanium retainers, ready for installation in your Milwaukee-Eight engine.
Will these springs fit my Harley-Davidson Touring or Softail model?
This kit is designed for Harley-Davidson Milwaukee-Eight Touring and Softail models. Always confirm fitment with your specific year and model using our Shop by Bike tool before ordering.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | KPMI |
| TYPE | Engine |
| SKU | 191-27792T |
| WEIGHT | 8.0 lb |
