Hi, There are many companies out there offering more horsepower for a chip replacement, the 993 requires a computer upgrade and normally companies request you send your old one in and have it done or exchange basis. They are not like the old 3.2 911 , these were easy, anybody could change the chip. My advise is to contact Performance Products in California, or Powerhaus.com. I also recommend changing the mufflers and air filter as just changing the chip is not enough and the three changes combined work well together, Hope this helps.
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