are they really worth gettin..does anyone have any installed? that have seen a significant notice? i was thinking about gettin em....the price tag isnt so bad , im all about performance..anyone ???[???]
Why are you asking this in the SPI forum?? If you're asking for an SPI, then there are a few UDP's out there. I have the AEM alt. UDP. It is the same as the one for the ZETEC. Make a difference? So-so. It revs a little faster, but nothing stellar. I also have the Black Diamond Racing crank UDP. It made a nice difference for me. They also offer a 50% UDP if you want to go that route.
If you're asking for an SVT, you're in the wrong forum.