Kibblewhite Precision 20-20435 Complete Valve Spring Kit - .415in. Lift

Designed for maximum performance. Feature interference-wound, double-chrome silicone springs; heat-treated steel base washers. Available in a complete set for one engine. Include steel retainers. Made in the USA. Require machining of valve guides for special seals. NOTE: May require R-Style valves to achieve correct install height Type: Intake / Exhaust. Retainer Material: h. t. Steel. Valve Lift: 0.415in. Installed Height: 1.375in. Seat Pressure: 129#. Open Pressure: 272#. @ Lift: 0.415in. Note: All components are the quality you can expect from Kibblewhite, manufactured to exact o. e. m. specifications. These o. e. m. replacements parts may be purchased separately. The basewasher is counterbored to fit a 0.665in. outside diameter seal.