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https://www.partzilla.com/product/y...?ref=2fec0f42ee09b13cb753922ac38d46f0f7883e2f i ran these for half of this summer. one turn is 360 degrees. these screws are half turn of stock. so if you want 2.5 turns out these should be 1.25 turns. i put my max*air screws back in. i was having a rich ness problem which i think is caused by the baffles in my cobras. they are very restrictive.so i was blaming the screws.if you wanted to by screws from a different type of motor i cant tell you which will fit. the only two screws that fits that i'm aware of is max-air and the 650's..
Yellow Household hardware Fastener Auto part Font
 
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