Performance Chip question????
 

So i found a Performance Chip and I was just wondering if anyone has ever bought anything from these guys before or know anyone that has.....Chip...If not, if I buy this thing how do I check to see if this thing really works? If I am gonna spend 300 bucks it better do what it says it will do!

save your money for a custom tune. Mass produced chips like that won't do anything helpful.