The Supertech spring seat locator for SPR-TS1015 is specified at 5.9mm thickness and intended for placement on top of the factory oil seal during installation. It supplies a defined seating surface to position valve springs and retainers consistently, aiding technicians in achieving predictable installed height and retainer alignment while assembling the valve train.
Supertech 5.9mm Thick Spring Seat Locator for SPR-TS1015 (Use On Top of Factory Oil Seal)