S&S Cycle 640 Camshaft For Harley Big Twin Evo

S&S has been in the business of making Harley-Davidson motorcycles go fast for a very long time, and their innovation in the world of bumpsticks is not exactly a secret. If you're looking for more power from your bike, a cam is a wonderful place to start - especially if you've already done most of the easy 'bolt-on' modifications. Installing an S&S cam is a surefire way to make your mill suit your riding style while getting maximum output.

Features:

S&S cams are tested on the dyno, street and track before being offered to the public
With hundreds of hours of testing on each cam, you know you are getting the best cam S&S can produce
Made in the USA

640 Cam Info:

Designed for large-displacement engines (110") with 10.5:1-11.5:1 compression ratio or smaller engines (96"-107") with 11:1-12:1 compression ratio
3000 RPM-6000 RPM
Does not require as much compression as 631 cam and provides more linear power delivery
Less overlap and fast ramps build higher cylinder pressure
Lower TDC lift makes installation easier
Intake open/close 25°/60°
Exhaust open/close 65°/20°
Intake duration 265°
Exhaust duration 265°
Lift .640"