Just pulled out my engine this past weekend and now I'm down to the bare block. Only thing in there is the crank, rods, and pistons right now. I'll be changing out my piston rings but I don't know what to get. I'd like to go a little above stock but not spend $150 for a set of rings. What is a good brand for 4.000" bore pistons? (I'm not boring out the cylinders) Keep in mind it almost never goes offroad and I don't drive it hard. -By the way, what is a piston ring filer for? And will I need one to re-install my pistons?