KPMI Spring Kit 20-20480 for Flathead Knucklehead 1930-2048
$351.00
Skip to product information
KPMI Spring Kit 20-20480 for Flathead Knucklehead 1930-2048
$351.00
This KPMI OEM replacement valve spring kit is engineered to deliver stock pressures while functioning seamlessly with stock cam profiles. Manufactured to exacting OEM specifications using premium modern materials and advanced design protocols, each component provides superior reliability.
The included valve springs are precision-wound from heat-treated, shot-peened Super Clean chrome silicon wire for extended service life. Paired with high-temperature steel retainers modeled via FEA analysis, this kit ensures maximum mechanical strength and direct interchangeability with stock components.
Key Features
| Brand | KPMI |
| Manufacturer | Kibblewhite |
| Manufacturer Part Number | 20-20480 |
| Type | Intake / Exhaust |
| Retainer Material | H.T. Steel |
| Spring Material | Chrome Silicon |
| Valve Lift | 9.5 mm (0.375") |
| Installed Height | 54.0 mm (2.125") |
| Seat Pressure | 29.5 kg (65 lbs) |
| Open Pressure | 59.0 kg (130 lbs) |
| Product Weight | 0.6 kg |
Highlights
- OEM replacement design matching stock cam profiles and pressures
- Springs wound from heat-treated, shot-peened Super Clean chrome silicon wire
- High-temperature steel retainers FEA-modeled for optimum strength
- Directly interchangeable with factory OEM components
Compatibility
Fits 1930–1948 Harley-Davidson Flathead 74" and 80" engine models.
Frequently asked questions
|