COMP Cams GM LS 0.615in Lift Conical Valve Spring Kit w/ Chromemoly RetainersFeaturing our innovative natural damping conical valve springs for increased RPM, this GM LS spring kit includes a set of retainers, spring seats, seals and locks for a complete kit that can handle . 615" lift from aggressive roller cams. Catalog Brochure A general brochure describing a brand, company, product line. If brochure in question is for a specific product, use code PDB. User 1 This Part Fits: Year Make Model Submodel 2001 2004 Avanti II Base