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Engineered for strong mid- to high-end performance, the 640 Cam delivers aggressive valve events while remaining installer-friendly. 🔧
- For large-displacement engines (110" and larger) with 10.5:1 to 11.5:1 compression and select smaller engines (96"–107") with 11.0:1 to 12.0:1 compression.
- Less overlap and fast ramps build higher cylinder pressure.
- Lower top dead center (TDC) lift makes installation easier.
- Designed for use with hydraulic tappets; requires high-lift springs.
- Made in the USA 🇺🇸.
Installer notice: Check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe-to-case clearance before final assembly.
: 0925-0044
In Stock
Data sheet
- Type
- Gear
- Units
- Each
- Brand
- S&S CYCLE
- Application
- Exhaust, Intake
- Grind
- 640 Series
- Exhaust Close
- 20°
- Exhaust Duration
- 265°
- Exhaust Lift
- 0,640"
- Exhaust Lift at TDC
- 0,192"
- Exhaust Lobe Centerline
- 112,5°
- Exhaust Open
- 65°
- Intake Close
- 60°
- Intake Duration
- 265°
- Intake Lift
- 0,640"
- Intake Lift at TDC
- 0,222"
- Intake Lobe Centerline
- 107,5°
- Intake Open
- 25°
- Harley Family
- CVO
Dyna
FXR
Softail
Touring
Vintage Big Twin
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Electra Glide Belt Drive | Big Twin | 1984 | |
| Harley Davidson | Electra Glide Sport | Touring | 1988 | |
| Harley Davidson | Electra Glide Sport | Touring | 1989 | |
| Harley Davidson | Electra Glide Sport | Touring | 1990 | |
| Harley Davidson | Electra Glide Sport | Touring | 1993 | |
| Harley Davidson | Electra Glide | Touring | 1984 | |
| Harley Davidson | Electra Glide | Touring | 1986 | |
| Harley Davidson | Electra Glide | Touring | 1987 | |
| Harley Davidson | Electra Glide Classic | Touring | 1983 | |
| Harley Davidson | Electra Glide Classic | Touring | 1986 | |
| Harley Davidson | Electra Glide Classic | Touring | 1987 | |
| Harley Davidson | Electra Glide Classic | Touring | 1988 | |
| Harley Davidson | Electra Glide Classic | Touring | 1989 | |
| Harley Davidson | Electra Glide Classic | Touring | 1990 | |
| Harley Davidson | Electra Glide Classic | Touring | 1991 | |
| Harley Davidson | Electra Glide Ultra Classic | Touring | 1989 | |
| Harley Davidson | Electra Glide Ultra Classic | Touring | 1990 | |
| Harley Davidson | Electra Glide Ultra Classic | Touring | 1991 | |
| Harley Davidson | Electra Glide Ultra Classic | Touring | 1992 | |
| Harley Davidson | Electra Glide Ultra Classic Special Anniversary Edition | Touring | 1995 | |
| Harley Davidson | Electra Glide Classic | Touring | 1984 | |
| Harley Davidson | Tour Glide Classic | Touring | 1984 | |
| Harley Davidson | Tour Glide Classic | Touring | 1985 | |
| Harley Davidson | Tour Glide Classic | Touring | 1986 | |
| Harley Davidson | Tour Glide Classic | Touring | 1987 | |
| Harley Davidson | Tour Glide Classic | Touring | 1988 | |
| Harley Davidson | Tour Glide Classic | Touring | 1989 | |
| Harley Davidson | Tour Glide Classic | Touring | 1990 | |
| Harley Davidson | Tour Glide Ultra Classic | Touring | 1989 | |
| Harley Davidson | Tour Glide Ultra Classic | Touring | 1990 | |
| Harley Davidson | Tour Glide Ultra Classic | Touring | 1993 | |
| Harley Davidson | Tour Glide Ultra Classic | Touring | 1994 | |
| Harley Davidson | Tour Glide Ultra Classic | Touring | 1996 | |
| Harley Davidson | Dyna Glide Sturgis | Dyna | 1991 | |
| Harley Davidson | Big Twin | 1984 | ||
| Harley Davidson | Dyna Super Glide Convertible | Dyna | 1994 | |
| Harley Davidson | Super Glide | Big Twin | 1984 | |
| Harley Davidson | Fat Bob | Big Twin | 1985 | |
| Harley Davidson | Fat Bob | Big Twin | 1986 | |
| Harley Davidson | Low Rider Custom | FXR | 1987 | |
| Harley Davidson | Low Rider Custom | FXR | 1988 | |
| Harley Davidson | Low Rider Custom | FXR | 1989 | |
| Harley Davidson | Low Rider Custom | FXR | 1990 | |
| Harley Davidson | Low Rider Custom | FXR | 1991 | |
| Harley Davidson | Low Rider Custom | FXR | 1992 | |
| Harley Davidson | Low Rider Custom | FXR | 1993 | |
| Harley Davidson | Low Rider Custom | FXR | 1994 | |
| Harley Davidson | Super Glide | FXR | 1986 | |
| Harley Davidson | Super Glide | FXR | 1987 | |
| Harley Davidson | Super Glide | FXR | 1988 | |
| Harley Davidson | Super Glide | FXR | 1989 | |
| Harley Davidson | Super Glide | FXR | 1990 | |
| Harley Davidson | Super Glide | FXR | 1991 | |
| Harley Davidson | Super Glide | FXR | 1992 | |
| Harley Davidson | Super Glide | FXR | 1993 | |
| Harley Davidson | Super Glide | FXR | 1994 | |
| Harley Davidson | Super Glide II | FXR | 1984 | |
| Harley Davidson | Super Glide Screamin Eagle | CVO | 1999 | |
| Harley Davidson | Super Glide Screamin Eagle | CVO | 1999 | |
| Harley Davidson | Low Glide Custom | FXR | 1985 | |
| Harley Davidson | Disc Glide | FXR | 1986 | |
| Harley Davidson | Disc Glide | Big Twin | 1984 | |
| Harley Davidson | Disc Glide | Big Twin | 1985 | |
| Harley Davidson | Sport Glide Police | Police | 1984 | |
| Harley Davidson | Low Glide | FXR | 1984 | |
| Harley Davidson | Low Glide | FXR | 1985 | |
| Harley Davidson | Low Rider | FXR | 1986 | |
| Harley Davidson | Low Rider | FXR | 1987 | |
| Harley Davidson | Low Rider | FXR | 1988 | |
| Harley Davidson | Low Rider | FXR | 1989 | |
| Harley Davidson | Low Rider | FXR | 1990 | |
| Harley Davidson | Low Rider | FXR | 1991 | |
| Harley Davidson | Low Rider | FXR | 1992 | |
| Harley Davidson | Low Rider Convertible | FXR | 1989 | |
| Harley Davidson | Low Rider Convertible | FXR | 1990 | |
| Harley Davidson | Low Rider Convertible | FXR | 1991 | |
| Harley Davidson | Low Rider Convertible | FXR | 1992 | |
| Harley Davidson | Low Rider Convertible | FXR | 1993 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1987 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1988 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1989 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1990 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1991 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1992 | |
| Harley Davidson | Low Rider Sport Edition (Fxrsl) | FXR | 1993 | |
| Harley Davidson | Sport Glide | FXR | 1984 | |
| Harley Davidson | Sport Glide | FXR | 1985 | |
| Harley Davidson | Sport Glide | FXR | 1986 | |
| Harley Davidson | Sport Glide | FXR | 1987 | |
| Harley Davidson | Sport Glide | FXR | 1988 | |
| Harley Davidson | Sport Glide | FXR | 1989 | |
| Harley Davidson | Sport Glide | FXR | 1990 | |
| Harley Davidson | Sport Glide | FXR | 1991 | |
| Harley Davidson | Sport Glide | FXR | 1992 | |
| Harley Davidson | Low Rider | Big Twin | 1984 | |
| Harley Davidson | Low Rider | Big Twin | 1985 | |
| Harley Davidson | Softail | Softail | 1985 | |
| Harley Davidson | Softail | Softail | 1986 | |
| Harley Davidson | Softail Night Train | Softail | 1998 | |
| Harley Davidson | Softail Custom | Softail | 1986 | |
| Harley Davidson | Softail Custom | Softail | 1987 | |
| Harley Davidson | Softail Custom | Softail | 1989 | |
| Harley Davidson | Softail Springer | Softail | 1988 | |
| Harley Davidson | Softail Springer | Softail | 1989 | |
| Harley Davidson | Wide Glide | Big Twin | 1984 | |
| Harley Davidson | Wide Glide | Big Twin | 1985 | |
| Harley Davidson | Wide Glide | Big Twin | 1986 |