2015 Harley liquid cooled with Andrew 54H cams tuned by The Starting Line Posted on November 19, 2014 by Starting Line 2015 Harley FLHTK liquid cooled 103 dyno test comparison after mapping for new cams and air breather. It is a super quiet engine that nicely out performs the stock bike on the road. 2015 Harley FLHTK dyno test results