COMP Cams Calibration Test Spring for #5313 20600Z Studs have a nut-starter radius

Studs have a nut-starter radius that helps prevent cross-threading

or rear end

750 x 36 Spline

Gauge kit includes Type-K Thermocouple

RZ-70 Helmets and others that have a Z-20 Series shield

COMP Cams Calibration Test Spring for #5313 20600Z Studs have a nut-starter radiusCalibrate your miniature valve spring tester (5314) with this calibrated test spring. The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development. One thing COMP Cams has never forgotten: Performance is defined by what happens out on the race track. Because no matter what happens on a dyno or in a computer model, if that theoretical performance doesn't translate into real