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underdrive Harmonic Balancer pully

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Old 06-03-2010, 11:58 PM
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Default underdrive Harmonic Balancer pully
What brand are you guys using??
Thanks
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Old 06-04-2010, 12:03 AM
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Asp udp
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Old 06-04-2010, 12:08 AM
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asp ud it works great alot of guys will say it doesn't help much. But i noticed a difference in the rpm range and my top end
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Old 06-04-2010, 10:07 AM
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Thanks guys. Now I start looking for place that sells them.
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Old 06-04-2010, 10:20 AM
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im running a ASP ud crank pulley only. i cant say i seen a difference bc i added a 90mm tb, and CAI
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Old 06-04-2010, 12:25 PM
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ASP, call Summit.
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Old 06-04-2010, 12:33 PM
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summit brand. it is actually a trick flow. What belts are you guys using? I have a gates and it squeaks when my truck shifts.
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Old 06-04-2010, 12:42 PM
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i use w.e Thunder Racing gave me lol
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Old 06-04-2010, 02:34 PM
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I saw these Trick Flow udp just the other day. That said, do they or anybody make a non-underdrive version that's SFI rated?
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Old 06-04-2010, 04:08 PM
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Originally Posted by fastnblu
I saw these Trick Flow udp just the other day. That said, do they or anybody make a non-underdrive version that's SFI rated?
ATI is what your gonna want to look for, pretty sure they make a oem size. they are expensive but are the best of the best when it comes to pulleys..

might even make a slight overdrive size, that might help some with that huffer of yours in the psi dept..
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