KIBBLEWHITE Racing Valve Spring Kit — 0.480" lift, 340 lb open, 158 lb seat – 57-83 Sportster
In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
Racing Valve Spring Kit engineered for high-performance valvetrain stability and endurance. ⚙️
Designed for its specific application, this kit accounts for critical parameters including cam profiles, harmonics, natural spring frequency, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm.
Progressively wound springs use Kobe super-clean chromium silicon (CrSi) wire that is heat treated and shot peened to resist fatigue and maintain consistent spring rates.
This is a complete set for one engine and is made in the USA.
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We do not ship to the Canary Islands, Ceuta, or Melilla.
Shipping costs are calculated automatically at checkout based on destination and weight.
Free shipping may be offered for qualifying orders, as specified on our website.
Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.
If your order is delayed or arrives damaged, you must notify us within 14 calendar days. We will investigate the issue and offer a resolution in accordance with applicable consumer protection laws.
In accordance with Royal Legislative Decree 1/2007 (Ley de Defensa de los Consumidores y Usuarios), you have the right to withdraw from your purchase within 14 calendar days from the date of receipt, without giving any reason.
To exercise this right, contact us via email or through our website, providing your order number and contact details.
If you want to return an item, please contact us first to give you detailed instructions.
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Sportster | Sportster | 1957 | |
| Harley Davidson | Sportster | Sportster | 1958 | |
| Harley Davidson | Sportster | Sportster | 1959 | |
| Harley Davidson | Sportster | Sportster | 1958 | |
| Harley Davidson | Sportster | Sportster | 1972 | |
| Harley Davidson | Sportster | Sportster | 1973 | |
| Harley Davidson | Sportster | Sportster | 1974 | |
| Harley Davidson | Sportster | Sportster | 1975 | |
| Harley Davidson | Sportster | Sportster | 1976 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1958 | |
| Harley Davidson | Sportster | Sportster | 1959 | |
| Harley Davidson | Sportster | Sportster | 1960 | |
| Harley Davidson | Sportster | Sportster | 1961 | |
| Harley Davidson | Sportster | Sportster | 1962 | |
| Harley Davidson | Sportster | Sportster | 1963 | |
| Harley Davidson | Sportster | Sportster | 1964 | |
| Harley Davidson | Sportster | Sportster | 1965 | |
| Harley Davidson | Sportster | Sportster | 1966 | |
| Harley Davidson | Sportster | Sportster | 1967 | |
| Harley Davidson | Sportster | Sportster | 1968 | |
| Harley Davidson | Sportster | Sportster | 1969 | |
| Harley Davidson | Sportster | Sportster | 1970 | |
| Harley Davidson | Sportster | Sportster | 1971 | |
| Harley Davidson | Sportster | Sportster | 1972 | |
| Harley Davidson | Cafe Racer | Sportster | 1977 | |
| Harley Davidson | Cafe Racer | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1972 | |
| Harley Davidson | Sportster | Sportster | 1973 | |
| Harley Davidson | Sportster | Sportster | 1974 | |
| Harley Davidson | Sportster | Sportster | 1975 | |
| Harley Davidson | Sportster | Sportster | 1976 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1979 | |
| Harley Davidson | Sportster | Sportster | 1980 | |
| Harley Davidson | Sportster | Sportster | 1981 | |
| Harley Davidson | Sportster | Sportster | 1982 | |
| Harley Davidson | Sportster | Sportster | 1983 | |
| Harley Davidson | Sportster | Sportster | 1958 | |
| Harley Davidson | Sportster | Sportster | 1959 | |
| Harley Davidson | Sportster | Sportster | 1960 | |
| Harley Davidson | Sportster | Sportster | 1961 | |
| Harley Davidson | Sportster | Sportster | 1962 | |
| Harley Davidson | Sportster | Sportster | 1963 | |
| Harley Davidson | Sportster | Sportster | 1964 | |
| Harley Davidson | Sportster | Sportster | 1965 | |
| Harley Davidson | Sportster | Sportster | 1966 | |
| Harley Davidson | Sportster | Sportster | 1967 | |
| Harley Davidson | Sportster | Sportster | 1968 | |
| Harley Davidson | Sportster | Sportster | 1969 | |
| Harley Davidson | Sportster | Sportster | 1970 | |
| Harley Davidson | Sportster | Sportster | 1971 | |
| Harley Davidson | Sportster | Sportster | 1972 | |
| Harley Davidson | Roadster | Sportster | 1978 | |
| Harley Davidson | Roadster | Sportster | 1979 | |
| Harley Davidson | Roadster | Sportster | 1980 | |
| Harley Davidson | Roadster | Sportster | 1981 | |
| Harley Davidson | Roadster | Sportster | 1982 | |
| Harley Davidson | Roadster Custom Sport | Sportster | 1983 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1983 |