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LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Underdrive Pulley??

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Old 03-14-2008 | 05:33 PM
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Mels SS
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Default Underdrive Pulley??
I read somewhere there is one out there any clue?
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Old 03-15-2008 | 09:22 AM
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Would an UDP from a 5.3 Vortec work???
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Old 03-15-2008 | 09:46 AM
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Dunno. Since we have a shorter crank snout, you'd have to a direct side by side comparison of a stock LS4 crank pulley and the underdrive one to see if they're compatible.

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