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By 55 GLASS TOP - 4 Years Ago
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Hello what is the difference between ECG -6564-A2 and ECG-6564-B2 what the difference between A2 an B2 thanks
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By paul2748 - 4 Years Ago
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The A2 uses the lock nut, the B2 is the interference (adjuster, not the rocker) fit. Same ratio on both The rockers are a little different where the adjuster screw in (thinner on the B2). You can use the interference fit adjuster on the A2, but it's tight as far as adjustment goes.
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By 55 GLASS TOP - 4 Years Ago
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Thank you.
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By PF Arcand - 4 Years Ago
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Further to what Paul 2748 says, both rockers are 1.54/1 ratio, but the thread on the one piece adjuster is an interference fit & while you can try to use them on the earlier A-2 rockers, it's a very tight fit, even when oiled.. I tried them in a vice, but felt it was too tight to be practicle to install on an engine....
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