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3.8" inches

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Q: What is the stock supercharger pulley size for a 1998 Pontiac Grand Prix GTP?
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What is the stock supercharger pulley size for a 2001 Pontiac Grand Prix GTP?

3.8


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simply take out the hex screw located on front of the supercharger nose. then either use a big syringe with a hose to suck out the oil or grab an old hairspray(or similiar) pump-spray bottle and take the pump part and stick down in their and get out the oil. I would also recommend changing the coupler while your at it if it is stock.


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