I just did the throttle cable mod, and am thrilled with the improvement in throttle response. I no longer have to bury my foot into the mat to get the car moving. I hate to say it, but this simple mod made a bigger seat of the pants improvement than anything else I've done to it. Of course it doesn't add any power, but it sure feels like it. If you haven't already done it, I highly recommend it. Here is a link to the instructions... Mustangworld - 99 - 00 Gas Pedal Adjustment tip