Hello guys, new here. I recently acquired a 2001 3.8L, I was curious what everyone thinks would be the next best mod to install, or what would mod would I see the most gain in performance out of. Budget around $500.
As of now I have.

-Cold-air intake
-Flowmaster exhaust
-shift kit
-posi differential
-SCT flash tuner

 

http://www.vapauto.com/windstar_full.htm

 

Thanks for the reply. what kind of gains can I expect to see? and where is pricing?

 

Peak gains of 7HP and 15FT/LBS and it should provide a steady ~15TQ gain throughout the most of the RPM band on a bone stock split-port. I can really feel the power at the higher end though, it pulls really well even at highway speeds. Also while you're in there it would really do you need to at least gasket match port and polish your lower intake for the best possible flow.

http://www.vapauto.com/windstar.htm

$375 (+ $35 Priority shipping) (+$40 TB core charge, refunded when you send in your stock throttle body)
65mm TB version is available for $40 extra

 

Well since your an auto I highly suggest a Tuner and 4.10 gears with a new posi diff, perhaps an Auburn unit. There are pleanty to choose from.

If you buy used you can get the tuner cheap (I bought my Diablo (I prefer SCT) for my 01' for $75 NEW.) Then just look for an upgraded rear end for sale or just the parts you need to upgrade yours.

Then you have a J-Mod valve body and tranny cooler as your next auto step.

You will feel a major increase with those upgrades.

Craigslist, Ebay and Forum F/S sections are your friend.