Stage 2 specials16 Nov, 2018 in Head Hoggers tagged haley horsepower / harlay head porting / harley 4 valve porting / harley big horsepower / harley big inch kits / harley bore and hone / harley case service / harley cp pistons / harley cylinder boring / harley engine machining / harley machine shop / harley race engines / Head Hoggers / motorcycle mobile dyno tuning / stage 2 head special by headhoggers (updated 1659 days ago) Another set out on doing our stage 2 special. $500.00 stage 2 heads. Includes a size up in valves, port work, surface, clean and assy. Let us know your needs!!