LS1 PAC 1237X Racing Springs (Race Only)

PAC Racing RPM Series valve springs were developed using all of the latest advancements from Circle Track and drag racing successes. This valuable, real-life research has been applied to new designs, which allow for a performance increase that exceeds all demands. The springs are made from quality materials and are available in different diameters and pressures to suit your specific camshaft profile.

SPECS:

PART NUMBER:PAC-1237X

MPN:PAC-1237X

Valve Springs

OUTER SPRING DIAMETER (IN.):1.274

OUTER SPRING I.D. (IN.):0.900INNER SPRING I.D. (IN.):0.630

MAX LIFT (IN.):0.700

LOAD (LBS) @ INSTALLED HEIGHT (IN):200 @ 1.800

OPEN LOAD (LBS) @ OPEN HEIGHT (IN.):585 @ 1.000

COIL BIND (IN.):1.045

RATE (LBS/IN.SQ):550