The COMP Cams ID spring seat for LS 26918 is a hardened-steel inboard locator that centers and secures beehive-style valve springs while protecting the head and shim at high spring pressures and RPM. The 4872 size measures 1.300" OD and 0.520" ID and is noted to work well with the COMP 26918 Beehive valve spring, providing stable seating for LS-style valvetrains.
COMP Cams Spring Seat For LS 26918 W/.5