RPM Series Dual Valve Spring Kit

The PAC Racing Springs PAC-1207X is a dual valve spring kit from their RPM Series line, engineered with the latest processes and materials for maximum spring life. As a leader in valve spring technology, PAC Racing has developed the 1207X dual valve spring to support aggressive lift profiles. This kit is an excellent choice for users running hydraulic roller camshafts with significant lift requirements. It is also suitable for those employing factory GM rocker arms with a low-lash solid roller camshaft. PAC Racing strongly recommends the use of quality aftermarket lifters with this valve spring kit, as OE lifters are not advised due to potential compatibility issues. The PAC-1207X features a maximum valve lift rating of .700". Key specifications include an install height of 1.800" with a closed spring pressure of 155 lb. at that height. At an open spring height of 1.150", the spring open load is 436 lb. The spring rate is 433 lbs/in, and the coil bind limit is 1.000". This kit includes essential components such as spring seats, valve seals, the PAC 1207X dual springs themselves, and retainers.