Supertech Titanium Retainer for SPR-TS1015

This is a Supertech Titanium Retainer, part number RET-TS5.5-T5. It is designed to work with the SPR-TS1015 valve spring. Titanium retainers are lighter than steel ones, which can help reduce valve train mass. This can lead to improved valvetrain stability at higher RPMs.

Supertech uses titanium for these retainers because it offers a good strength-to-weight ratio. This means they can be strong enough to handle the forces from the valve springs while still being significantly lighter than steel. This weight reduction is particularly beneficial in performance applications where reducing reciprocating mass is important for engine responsiveness and durability.