Just kinda wonderin if they made a noticable amount of difference in our cars?

Jeffrey10x4 looked at it some, a $200 stage 2 jet chip will do the same, AND add horsepower

I agree. Kyle and I were talking about this very thing last night. What some of the 'other' devices do, and how/whether some of the performance PCM'* do the same.

I think a Jet chip or module (IF it did the same things) would be a better investment. Other than that, I couldn't tell you.

I don know that it APPEARS to do more than it actually does (the B&M). I think Jeffrey made some discoveries, and it does very little for the 4T60E.

yeah i bought the shiftplus from autozone for $40 and it did nothing. all it does it create a vacuum leak and the switch for it is a screw that lets the air out more or less. It is a waste of money and i returned it. Don't buy it!!!

thanks for the advice guys, ill probably just save the money for the chip then