TP Underdrive Pulleys - Power Hungry Performance Forum

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TP Underdrive Pulleys

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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.

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Sun, February 7th, 2010, 11:22 PM

Punisher

Double Whopper

Join Date: Jan 2010

Location: McDonough, GA

Posts: 30

I've had the TP underdrives for about 3 months now. When I swapped the pulleys I also installed the TP eFans so my opinion is going to be of the upgrades combined. I've noticed that the engine is much more responsive. As for mpg's... not so much. I've not noticed any mpg gains but that may have more to do with my foot than anything else.

Pics of stock and the TP underdrives below:

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	TP Underdrives-01.jpg (22.1 KB, 12 views)
	TP Underdrives-02.jpg (25.1 KB, 13 views)

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