CHIPS or ECU Flash. There are 4 main companies that are all respectable. APR, REVO, Unitronic, & GIAC in order of popularity. These companies can all offer gains by increasing boost levels electonically and remapping the computer to compensate. Advertised gains are on the 40-50 hp range and even better torqe gains. This is the truth and not bull. The 1st 3 companies offer a stage 1 basic tune and a stage 2 after you add at least a high flowing downpipe or testpipe. My personal favorite is APR because you can switch from Tuned back to stock and lock it in with a code all via the Cruise Control stalk. This will keep dealers out stealthy like or keep the car slower if someone else drives your car. I have used REVO and liked it very well too but you need a special box to plug in to switch programs. GIAC uses an adaptive tune that will notice your car when you add a DP or testpipe instead of a stage 2 tune. GIAC will not get rid of your check engine light like the others do so I do not recommend this company for that reason. There is also a stage 2+ program but a higher flow Fuel pump is required. Remember that an upgraded "D" Diverter valve and the PCV fix should be used when getting a chip. Using a boost gauge will also let you know when these items have failed (and the WILL). APR Video on swapping programs and security code feature. APR Video