is anybody know about hummer H3 performance chip, i need more power more HP

 

I am not sure what chip you are refering to. There is alot of information in the H3 section about modifications. The big 3 are replacing the cold air intake (airdoc seems to be very popular and economical), aftermarket performance exhaust and a pcm tune(www.pcmforless.com). Hope this helps.

 

Yeah, computers (PCM as they call it) do not allow a 'chip replacement' like the older models that had an ECM socket. I believe they are all flash memory nowadays, so you either need a programmer, or I believe a lot of guys use the above-mentioned pcmforless site and IMO $199 is very reasonable.

 

how many HP i get with replacing cold air intake? thanx for suggestions!

 

Maybe 5 to 8 Hp. Gas mileage will go up about 2 mpg though.