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These Supertech titanium valve retainers are a set of 16 made for the SPR-TS1015 Subaru STI application, listed for use under the bucket shim. Supplied as a match-specific retainer set, they offer a lightweight replacement for OE retainers where titanium retainers are required for valvetrain upgrades. Use them when rebuilding or upgrading the STI valvetrain to compatible component sets.
Supertech Titanium Retainer for SPR-TS1015 Subaru STI (Under The Bucket Shim) - Set of 16
