COMP Cams Calibration Test Spring for #5313 Lead Ballast of load-leveling capacity (Note: Do

of load-leveling capacity (Note: Do not exceed vehicle's GVWR)

Large Opening

retain classic look while still offering venting

and more fade resistant

1975-1978 Ford Mustang II

COMP Cams Calibration Test Spring for #5313 Lead Ballast of load-leveling capacity (Note: DoCalibrate 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