The Eurocharged site states an increase from 215hp to 239hp on an otherwise stock engine. (Mind you this is crank horsepower, not at the wheel) The bigger TB by itself is not going to give you any real gain in power, but it starts to eliminate weak spots in the power band when you accelerate. But if you have it tuned they might be able to squeeze a few more ponies out of it.

What I'd like to know is how this engine cover mod compares with the NeedsWings intake in terms of power.