Supertech Performance SEAT-RB25-E Spring seat locator for SPR-TS1015 / Nissan RB25 Exhaust side/ Thickness 9.60mm (.378").

Supertech Performance SEAT-RB25-E Spring seat locator for SPR-TS1015 / Nissan RB25 Exhaust side/ Thickness 9.60mm (.378").

Supertech Valve Spring Seats are basically washers or shims that are required to allow proper seating of the valve springs. Without valve spring seats, the valve springs will not function well under coil bind conditions. Valve spring seats will keep the valve spring rate consistent and balanced.