hunt2elk
Well-Known Member
Set of 8 pistons, rings, and pins. These came in a kit from 440 Source 400.451.5056. 4.380" (.040" over) -4 flat top. Listed as working with 3 of their kits. 400-451, 400-512, and 440-543. I ran them for about 2500 miles. With stock Stealth heads and my 400 block, the actual measured compression ratio measured 10.3:1. I recently pulled the motor for new bearings and gaskets. Decided to replace the pistons to drop the compression a bit. Upon removal it was discovered there was some carbon build up. The engine builder figured it was from bad valve seals. I soaked them in lacquer thinner for 20 minutes and rubbed off the carbon with a nylon brush. They look nice. $400 plus shipping with friends and family. Add 4% if you prefer goods and services. Platinum Series Pistons - 4.380 -4 FT-440 Source
Last edited:
