Product Details Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs Compatible with boosted or turbocharged applications CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high rpms with high-performance camshaft capability Kit includes 12 titanium retainers, 12 CrSi Valve Springs and 12 H.T. Steel Basewashers Product Videos Custom Field Product Reviews Write a Review Write a Review × Kibblewhite Kibblewhite #40-40800 - Spring Kit Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *