COMP Cams, the absolute leader in valve train Technology, is proud to introduce Honda B-Series DOHC with VTEC valve springs. Years pf valve strong R&D and cutting-edge Technology were used to produce this "premium" valve spring for this demanding sport compact engine application. Race quality wire and excusive manufacturing Techniques enable this spring to maximize "harmonic resistance" for smoother and more stable valve control. The #913 springs use a dual spring design for the intake and a single spring for the exhaust, to deliver the performance you expect in a simple drop-in Installation.