The Supertech inner spring seat locator for SPR-TS1015 is also referenced for M1007D applications and provides a controlled seating surface for valve springs and retainers. It helps center springs during installation and supports repeatable installed height, making valve-train assembly cleaner and more consistent when used with compatible Supertech parts.
Supertech Inner Spring Seat Locator for SPR-TS1015 / M1007D