COMP Cams Calibration Test Spring for #5313 Lead Ballast and more fade resistant

and more fade resistant

Sizes: 6 3/4 (54) to 7 3/8 (59)

Large Opening

Retention ears - the collar features extended vertical ears at the outside edge that help to keep your belts on the FLEX even in a secondary impact

1975-1978 Ford Mustang II

COMP Cams Calibration Test Spring for #5313 Lead Ballast and more fade resistantCalibrate 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