S&S 640 Camshaft
This 640 is for Evolution Big Twin models with large displacement motors with compression ratios of 10.5 - 11.5:1 or smaller motors with 11:1 - 12:1 compression ratio. The nice part is that this cam does not require as much compression as the 631.
- Made in the USA
Product Note: Spring spacing is required for use with hydraulic tappets.
Specification | Details |
---|---|
Country of Origin | USA |
Engine Type | Evolution Big Twin |
Exhaust Duration | 270 degrees |
Exhaust Lift | .214 in. |
Exhaust Lobe Center | 110 degrees |
Exhaust Timing (Close) | 25 degrees |
Exhaust Timing (Open) | 65 degrees |
Intake Duration | 265 degrees |
Intake Lift | .228 in. |
Intake Lobe Center | 107.5 degrees |
Intake Timing (Close) | 60 degrees |
Intake Timing (Open) | 25 degrees |
Valve Lift | .640 in. |
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Harley Davidson
Harley Davidson
- FLHR Road King 1995-1998
- FLHRCI Road King Classic 1998
- FLHRI Road King 1996-1998
- FLHT Electra Glide Standard 1995-1998
- FLHTC Electra Glide Classic 1995-1998
- FLHTCI Electra Glide Classic 1996-1998
- FLHTCU Ultra Classic Electra Glide 1995-1998
- FLHTCUI Ultra Classic Electra Glide 1995-1998
- FLSTC Heritage Softail Classic 1995-1998
- FLSTF Softail Fat Boy 1995-1998
- FLSTN Heritage Softail Special 1995-1996
- FLSTS Heritage Springer Softail 1997-1998
- FLTCU Ultra Classic Tour Glide 1995
- FLTCUI Ultra Classic Tour Glide 1996
- FLTR Road Glide 1998
- FLTRI Road Glide 1998
- FXD Dyna Super Glide 1995-1998
- FXDL Dyna Low Rider 1995-1998
- FXDS-CONV Dyna Convertible 1995-1998
- FXDWG Dyna Wide Glide 1995-1998
- FXSTC Softail Custom 1995-1998
- FXSTS Springer Softail 1995-1998
- FXSTSB Softail Bad Boy 1995-1997
Customer Reviews
Write ReviewBe the first to review this product. How many stars would you give this product?
Questions & Answers
Ask QuestionHave a question? Please ask our experts and customers who own this product.