roundman

don't know the diff between your 98 and an 03 Cobra, but Horsepower TV used a Hypertech Power Programmer on a bone stock 03 Cobra and the rear wheel HP went from 364 up to 407, an increase of 43 HP or 11.8% increase. after that, they replaced the stock pulley with 3" one and reprogrammed it again and the HP went up to 415 at the wheels. then they went with a 2.8" pulley and reprogrammed once more and got up to 427 rwHP. That ain' bad at all considering they barely got their hands dirty changing the pulleys out.

Monty

The 03's have a blower and the 98 dont