okay I'm not too good on the mecanical stuff my brother is a Harley certified tech but has not worked in a shop for several years, I was talking to him about adding a oil cooler kit the premium kit # 26155-07 this will be dealer installed my brother suggested I check into stage 1 upgrades that he implied some improvements are a simple code change. the dealer said the cooler install was a 3.5 hr job, does that sound right? If my brother lived closer than 1300 miles away I would have him install it. anyway what advise can you give on preformance upgrades will be helpful