GSC Conical Valve Spring and Titanium Retainer Kit for shimless bucket, or shim over bucket (Gen2) style only.

ALL NEW! Conical valve spring design with lightweight titanium retainers.

Designed for High RPM and High Boost levels.

GSC's most advanced, stable valve spring design.

Drop-in, no machining required, compatible with even the Gen3 S3 cam

Must use either shimless buckets, or if you already have them, and don't mind the weight, I suppose you could retain your Gen2 shim-over buckets. If you do keep shim-over, don't tell anyone, or they will make fun of you, and for good reason.

Who is ready to make some power?