The Supertech titanium retainer for M1007/TS1015 springs is specified for a 5.5mm valve stem and serves as the replacement retainer securing spring and keeper interfaces. It is intended to match the M1007/TS1015 spring dimensions to maintain correct installed height and valvetrain geometry during repairs or rebuilds that call for that stem size and spring family.
Supertech Retainer 5.5mm Stem Spring M1007 TS1015 Titanium