S&S High Compression Piston Kit For Harley 110 Twin Cam Not satisfied with 86 horsepower from your CVO 110 engine Neither were we! Make that BIG HOG really run. Here's how: Install an S&S performance exhaust and air cleaner - a must for any performance upgrade Install a set of S&S 585 bolt-in cams 420-435 or 420-436 and tune the EFI system - produces over 107 horsepower Increase the compression ratio from the stock 9.3:1 to 10.6:1 with S&S high compression pistons - brings the horsepower up to 114 Features: Significant performance increase - See the dyno chart Don't trade torque for horsepower - get more of both! See the dyno chart Easy installation! All parts bolt in without splitting the cases or even removing engine from the frame S&S Cycle Easy Start Cams ensure reliable starting even with high compression pistons Easy EFI tuning with free calibration downloads for Dynojet Power Vision tuner or S&S Cycle EZ Loader - no expensive dyno time required