I looked in the ebay and saw Acura Integra Performance Module. I am wondering if this item really work? Any one has used this before? Is it easy to install it? Is it leagal thing to do? Thanks A lot in advance

Yes, they work awesome, get it on eBay if you want it cheap. But they help if you want performance for sure. I race every weekend and i love it. Most definetly recommend this part. Good Luck!