Prior to these little aluminum gears, cam timing changes meant hours of labor "keying" the fixed cam gear and guess work to change cam timing. Fast forward to the new age of technology. The need for adjustable cam gears are many, namely a reliable, precise and affordable method of fine-tuning the action of the valves to complement the installation of performance add-ons (headers, cams, intakes) or specialty milling work on built engines. More...
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