I have been asking everyone the same question because I want to upgrade too. I was really about to get the Kenne Bell, but after today I just talked to several places that dyno. They all said the same thing. They are almost the same in power, but what just made me change my mind about kenne Bell and going to Whipple was because the same issuer came up. The customer service with Whipple I have been told really care and help you out. The response about Kenne Bell was that they are not there to back you up with problems, and the said the other day they were working on a kenne bell that broke, and the customer service rep hung up on them and told them they weren't willing to help. I called Kenne Bell 2 days ago, and they were not very helpful in steering me to exactly what I need. They had the attitude just buy it and stop bothering me with questions. I don't know much at all about superchargers, and turbos, and that attitude made me feel pissed off wiht them, and I hav't even started to have problems with the actual product. Several people have told me they had similar problems wiht them, so I would reccomend Whipple. Call them both up, and see who you feel helps you out better, but fond out that stuff before you spend all your hard earned cash.
03 Cobra SVT - Stock from factory. Dyno at 414.89 rwhp and 389.26 tq. 8.7 boost 11.68 A/F Ratio. Completely stock no alterations.