Manley Valve Spring Set 221438-16; NexTek High Performance 353 lbs/in. Single Spring 1.311, 1.076 in. for GM LS

PAC Racing Springs developed this new process using all the latest advancements from their circle track and drag racing successes. PAC Racing Springs has applied this new method to great designs that will allow for a performance increase that exceeds all demands. 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. PAC 1200 Series Street Performance Springs are used for to replace or improve on the performance above and beyond OEM engines. These springs are selected when you are upgrading camshafts or doing engine re-builds. The 1200 series line uses a premium alloy that out performs automotive industry standards, additionally PAC Racing Springs processes these springs to aerospace shotpeening standards to allow for superior fatigue performance. PAC Racing uses a proprietary process to ensure the springs maintain the load needed to withstand the rigors of street performance and mild racing applications.