RB30 double valve springs 

Part number - 5833-12
Number of Springs Per Valve - Double
Spring Rate - 300 lb/in.
Outside Diameter of Outer Spring (in) - 1.333 in.
Inside Diameter of Outer Spring (in) - 0.980 in.
Inside Diameter of Inner Spring (in) - 0.760
Free Length (in) - 1.820 in.
Solid Height (in) - 0.788 in.

For over 30 years Crow Cams have maintained the most advanced cam development and CNC grinding facilities in Australia which have been used by car companies and our most successful racers to great effect.
Crow cams RB30 valve springs 5833-12

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