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Old 09-08-2016, 08:58 AM   #1
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Mach 1 underdrive pullies

Quick question will a 01-04 gt kit work on a mach1 cause I see they are marking up the price for the mach/ cobra specific one but can't tell the difference between the two
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Old 09-08-2016, 11:47 AM   #2
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Many have mixed results with underdrive pulleys on the Mach 1's and some claim that they have lost their oil pump gears because of them. The harmonic balancer is there for a reason - absorb or 'cancel out' vibrations in the crank. When you change the size of the pulley, you're changing it's ability to do it's job correctly. UDP's are a risk for freeing up a measly 5-10hp IMO and not worth it, but people do them anyway lol.
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Old 09-08-2016, 01:07 PM   #3
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Not worth the loss of accessory performance for me (ac compressor, alternator, etc)
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Old 09-08-2016, 01:14 PM   #4
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Not worth the problems that will be caused.
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Old 09-08-2016, 01:35 PM   #5
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Ahhhh ok I didn't know that they affected those, I just wanted something that looked nicer in the engine bay

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