Kibblewhite Precision 20-2210 Complete Valve Spring Kit - .480in. 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: 0.480in. Installed Height: 1.315in. Seat Pressure: 157#. Open Pressure: 342#. @ Lift: 0.480in. Note: May require R model valves to achieve installed height. Kibblewhite recommends using valves with a longer Ol. Part numbers # 20-4167 (Intake) and 20-4168 (Exhaust).