Originally Posted by willwren
Keep in mind the S1 and S2 pistons are not the same. The topic author has a S1. Those vendors may or may not support the S1 (which has two different pistons depending on year).
My mistake, I went back and looked at their 2007 catalog. Diamond only has L67 and Buick T-Type pistons listed, nothing in the middle.
So, in the forged catagory, nobody is making a S1 as a catalog item. Based on the quotes I received for custom pistons, the price on a set of forged S1'* would be in the $800 range.