Locks cam phasers in fully advanced or fully retarded position ** Eliminates possible piston to valve problems with aftermarket camshafts ** Eliminates possible cam phaser failure in high HP applications ** Billet aluminum construction ** Custom tuning is required with this product ** After locking the cam phaser in place, the check engine light will come on. Tuning is required to turn the light off **** These are intended for use in stock/factory cam phaser applications. Some of the newer aftermarket camphasers are made differently and will not accommodate these locks. **** **** These cam locks are made to fit with very tight tolerances. It will fit a factory new Ford phaser but they do not fit all aftermarket phasers. They are machined to tight tolerances to eliminate phaser chatter ****
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