BBK 1640 Variable Timing Adjuster Crank Pulley Kit
This BBK Vari Time adjustable timer is a great way to maximize horsepower and torque potential on any 4.6L or 5.4L Ford car or truck. Gain up to 10hp by simply advancing your timing a few degrees or you can set the timing back a few degress to run more boost with out detonation. Great for naturally aspirated, supercharged or nitrous applications.
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