It’s going down.24 May, 2018 in Head Hoggers tagged 124" short rod turbo / Aero charger turbo / harlay head porting / harley 4 valve porting / harley big horsepower / harley big inch kits / harley cylinder boring / harley engine building / harley engine performance / Harley full service / harley machine shop / harley machining / Head Hoggers / in house CNC machines by headhoggers (updated 2386 days ago) I spy power in a box. Lol.