HH STAGE 3 heads15 Jun, 2017 in Head Hoggers tagged harley big horsepower / harley engine kits / harley head porting / Harley Performance / harley service / Head Hoggers / motorcycle mobile tuning by headhoggers Just finished up with these stage 3 heads for one of our Harley dealers. These are paired with our CP 107 pistons and ported SE 50mm TB. Using Woods TW999-6 cams. Comp is setup at 12.2:1. Will try to get dyno sheet on setup. Stay tuned.