Jet Performance Modules??

[SPreston2001]

Hey guys I thinking of buying a Jet Performance Module from a buddy of mines for my Beast. Has anyone ever used any performance modules on their Expys with any success? This module plugs into the ECM and adjust the air to fuel ratio and transmission shifts to give you more HP and torque. Heres a link http://www.4wheelonline.com/Products.aspx?CategoryId=21168&ProductID=68189 Thanks

 

[AvroAero]

I had a superchips one on my 4.6 and it didn't do much. helped a little low end. mine was also modded. not worth the 500 though

 

[green03]

There is no replacement for reprogramming the PCM the modules just fool analog values seen by the computer and for the most part the computer eventually just tunes the changes out.

Matt R