Originally Posted by TrueWildMan
Another option you might consider is hypereutectic pistons. They're quite a bit lighter, but are also quite a bit more expensive. I would suggest only using these pistons with lighter rods, H-type erhaps.
The OEM pistons are "Hypereutectic"..High Silicon cast aluminum alloy. Only upgrade would be going to forged pistons. Diamond being the only one off-the-shelf maker of forged 3800 pistons. JE and others will do them as a custom order, but at a very expensive price.
The least expensive pistons are Sealed Power (Dana) replacement pistons, available in overbores, and they are coated like the GM stock pistons.