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underdrive pulley

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Old Jan 10, 2007 | 04:49 PM
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07 z71 silverado's Avatar
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Default underdrive pulley
what kind should i get and where do i buy one and how much power gain
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Old Jan 10, 2007 | 05:34 PM
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asp is the only company that sells them for our trucks i believe. tbyrne has them------------------------------------------->
i think it frees up like maybe 10-15
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Old Jan 10, 2007 | 05:39 PM
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really cause i was going to get that and do the tb bypass while doing that to and get my cats cut off i wonder how much that would free up. where do you buy them.
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Old Jan 10, 2007 | 10:06 PM
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i bought my underdrive pulleys from tbyrne, puttin on the pulleys and cuttin off the cats will probably give you about 20rwhp max.
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Old Jan 11, 2007 | 07:26 AM
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and tb by pass pretty much all in one day
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Old Jan 11, 2007 | 07:44 AM
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Headers for the same money!
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Old Jan 11, 2007 | 12:41 PM
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yeah john you can get freakin headers for the same price as a pulley
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Old Jan 11, 2007 | 03:28 PM
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the tb bypass aint going to do much, probably not even 1rwhp...... but hey, any lil bit is good. plus everyone is doing it, lol.
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