Why are UDPs so hard to find for the 4.0? - Ford Mustang Forum
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post #1 of 2 (permalink) Old 01-17-2012 Thread Starter
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s197inthe208's Avatar
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Why are UDPs so hard to find for the 4.0?

I've been looking and looking for an UDP for my v6 and I'm just having no luck. I remember searching and finding one brand maybe a half year ago but now I'm just coming up with nothing. Anybody have any links? Seems dumb that it's so hard to find.

ASP? PHP? Thanks in advance. Also any actual dyno results or seat-of-the-pants reviews? Or would my money be better spent toward a posi dif.

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post #2 of 2 (permalink) Old 01-17-2012
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UDPs are a pretty much a waste on newer cars. They did make good power on old 5.0s and the like by the pulley and accessory design is superior now.
You would be spending several hundred dollars for maybe 3hp gained.

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