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The GSC Power Division chromoly CNC spring seat is a single-piece valve spring seat for 4G63T engines, finished at .035-inch over OEM. Machined from chromoly and sold individually, it lets engine builders adjust spring heights or replace worn seats during valvetrain assembly. The part targets the 4G63T platform where precise spring seating and durability are needed.
GSC P-D 4G63T .035in over OEM Chromoly CNC Spring Seat (SINGLE)
