For starters we're talking about an LS engine. I'm not sure what the stock bore is on the LS, but I've seen a few people talk about boring it out to 84-86 mm (around 2.0 litre). What is involved in this process? I know you're going to have to take it to a machineist and bore it out plus resleeve it. What is the cost? What additional parts would a person have to buy? i.e. new pistons...? anything.. and for quality parts, whats an average cost?