This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.
S&S Cycle 551 Camshaft Kit For Harley Twin Cam
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.
551 Cam Info:

Originally designed as a bolt-in, high-torque cam for Touring bikes with compression ratios between 9:1 and 9:9

More power across the RPM range, with improved low and midrange torque

Strongest from 1000 RPM-4000 RPM

Can be used with some engines with stock valve springs, pushrods, and lifters; high-lift valve springs may be required for some applications

Intake open/close 18??/20??

Exhaust open/close 39??/15??

Intake duration 215??

Exhaust duration 237??

Lift .550″

Made in the USA