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GSC Power Division Stage 1 beehive valve springs for the 4G63T (Evo VIII–IX) provide a focused valvetrain upgrade where factory retainers and spring seats are retained. These springs are specified as Stage 1 beehive type and intended for use with the original retainers and spring seats, offering a compact way to address valvetrain control without changing the OEM mounting hardware.
GSC P-D 4G63T EVO 8-9 Stage 1 Beehive Valve Springs (Use Factory Retainers and Spring Seats)
