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If your car is a 98' you already have a flashable ecu, the cable you would get from Openport, you want the Openport 2.0 its the only one that will work, you would then download Evoscan for your datalogger (you get a subscription to Evoscan if you buy the Openport cable) and you download Ecuflash to flash your ecu with (free download) you also download Ceddymods to use within Ecuflash to tweak your tune with.