most timming gears have some sort of markings on them and if the to line up when you put it on then you are set to go most have dimples and some have half arrows that point at each other and only on the front side not sure this is what your where asking about but hope it helps if it is
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Jay's
09 XL reg cab
L4 2.3 , 40 series flowmaster , tinted windows 5% back 35% sides ,muffler removed from air box mod ,and ac on off switch mod , blinker mod, avs window vent shades
coming soon! k&n drop in/fiberglass bed cover/bed sprayed liner
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