I have a set of 4.1 .030 pistons and turbo rods for sale. The pistons are Silvolite pistons. They are dished style pistons and are rated for 8:1 compression from what I could find on the internet. I am pretty sure they are cast pistons. The info below is from a page I found on the internet about the pistons. They came out of a N/A motor that I bought that was in a Toyota 4X4. They are still together with a set of 763 rods. $50 plus shipping for pistons and rods. Keep in mind the rods are worth about $40!
V6 252
4.1L
3.965(IN)
100.7(MM)
BUICK
ENGINE 1980-84
8.0 All with 4.1 liter engine. 3.193" dia. head recess .256" deep.
APPROXIMATE HEAD VOLUME=28cc
Comp. Ht. 1.808
Pin Dia..9398 1732
Std.
.020
.030
.040
.060 2-5/64
1-3/16 25505374 25501263
V6 252
4.1L
3.965(IN)
100.7(MM)
BUICK
ENGINE 1980-84
8.0 All with 4.1 liter engine. 3.193" dia. head recess .256" deep.
APPROXIMATE HEAD VOLUME=28cc
Comp. Ht. 1.808
Pin Dia..9398 1732
Std.
.020
.030
.040
.060 2-5/64
1-3/16 25505374 25501263
