Comp Cams Valve Spring Lock; Single Groove; 7 Degree Lock Angle Sparco Size allows for use on

Size allows for use on engine stand or with the engine still in vehicle

Suitable for 3-

4 locking acorn lug nuts

or do I need the Styleside version

If you're upgrading to a larger rotor or different caliper setup

Comp Cams Valve Spring Lock; Single Groove; 7 Degree Lock Angle Sparco Size allows for use onMost people believe that the tang inside a Valve lock holds the retainer and Valve Spring in place while the Engine is running. This is not the case. The cross section of material in the tang is not strong enough to withstand open Spring loads of 1000 Pounds or more. The sole purpose of the tang is to temporarily locate the lock, retainer and Spring relative to the Valve until the taper of the retainer can nest around the outside surface of the lock.