performance chips

[bones420]

i noticed on ebay they are selling alot of pro choice performance modules and gorillachipz they are stage 1 chips for non turbo engines are these things junk or do they really work will it hurt a stock engine?
they are like $ 30 . ??????????????????????????

 

[ryanM]

they dont do anything

 

[wannabe]

wast of money. do not buy it.

 

[gtoman_05]

Is there actual performace chips that do do something for like a stock engine.... a D16Y7 for example??