[Shane@DBPerformance]

Not too bad, the BBX has quite a bit more boost up top though, looks like around 5 more psi up top. That is how a lot of turbos make more power though, by being able to just hold boost. But around 4500 where the boosts like about the same, there looks to be good gains. A lot of guys going from already big turbos to bigger turbos fall into the trap thinking that running the same boost on their XXL turbo as they did on their XL turbo will make more power, when it often doesn't. To quote Robert from FP, "If you are carrying 5 gallons of water in a 10 gallon bucket, you dont need a bigger bucket."

The upgraded turbo Evo X dyno charts start looking a lot like VTEC power bands with their peaky power band though.