[SLOW 97]

The Kenne Bell's are pretty cool but they don't make quite the peak power of a centrifugal blower. I think the best blower out there right now is the Procharger P1-SC or the DI-SC. With the P1 you'll be looking at mid 11's. With the D1 and some minor tuning you could see high 9's and still be a reliable daily driver. Plus the new Prochargers are self-contained (that's what SC denotes) which means they are easy to install. It all depends on where you want to make power. The twin-screw Kenne Bell kit makes awesome low end torque which is what the 4V lacks. But the centrifugal will give you the most peak power. As for roots blowers, there currently aren't any for the 4V.