Beehive Valve Springs combine the latest technology available. By reducing the top coil of the spring it allows for a reduced mass retainer. Additionally, beehives offer a multi-arc (Ovate or Egg Shaped) that allows for the stress distribution of the wire to be equally distributed on the opposing sides of the wire. Combine these features and the result is a variable frequency spring that performs at a higher level RPM over traditional springs. PAC Racing Springs offers a large selection of beehive for the standard engines.