Rocker arm stud girdle

Rusty67

20+ Year Stangneter :roc</strong><span class=
Dec 3, 2002
3,749
37
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LA, CA
How much power do you need to be making before these do anything ? Is it more related to the HP/Tourque of the motor or the RPMs you are turning ? Basically, would I need to use a rocker arm stud girdle ?