These are NOS Arias forged pistons with pins. There are 8 of them and they were originally designed for 232/258 6 cylinders. However, I have compared them to a V8 cylinder head and they should also work for a 290 or 304. They are 1.595" compressed height and 3.810" bore (+.060") with a .150" dome and nice deep valve pockets. These would male HIGH static compression. In a 6 cylinder, I estimate something like 13:1, but since I don't know the exact volume of the dome, I can't nail it exactly. I contacted arias with the job number off the box and they said that the number is too long ago for them to still have on record. The pistons have some lightening work under the dome.
I was going to build a 6 cylinder drag motor, but have since changed my mind and need to money for my 401 project.
$200+ shipping
