Performance Chip?
 

http://www.performancechipsdirect.com/Chevy/Blazer/

It just is one of those things where it is almost too far-fetched. I mean I KNOW I probably wouldn't get gains of 60hp and wouldn't expect to and I don't even know if it will work with 4wd models if that matters. Can someone explain this too me that's the point of this post I mean how does it work they give explanations but I figured maybe you guys have tried these in the past or something..

just a scam, the only difference you see is a lighter wallet.