4.6 Ford DSS GSX Series Forged Piston (For use in 3.543" stroke x 5.933" rod) with large valve reliefs for SOHC 2V applications using Twisted Wedge heads, 1.210" comp hgt, Includes .866" full floating pin with double True Arc pin locks, 1.5-1.5-3.0 mm low drag ring groove, patented "X Groove" skirt design.